A 3digit positive integer is selected at random. Find the probability that A) The last two digits of the number is 22 B) The number is greater than 900 C) The number is less than 100 D) The number contains
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math
please help! 1.) A random digit from 1 to 9 (inclusive) is chosen, with all digits being equally likely. The probability that when it's squared it will end with the digit 1. 2.) A random number between 1 and 20 (inclusive) is chosen. The probability that

math
What is the probability that a randomly selected threedigit number has the property that one digit is equal to the product of the other two? Express your answer as a common fraction.

probability
please help! 1.) A random digit from 1 to 9 (inclusive) is chosen, with all digits being equally likely. The probability that when it's squared it will end with the digit 1. 2.) A random number between 1 and 20 (inclusive) is chosen. The probability that

mathematics
A box contains three whole, two red balls, if two balls are selected at random find the probability that a) one red and one white ball are selected b) two of the same color is selected c) no white balls are selected d) no read balls are selected

probability theory
3 students; A, B and C, are in a swimming race. A and B have the same probability of winning and each is twice as likely to win as C. Find the probability that B or C wins the swimming race. 3) Given three boxes as follows: Box A contains 3 red, 2 white

math , probability
Let X and Y be two independent and identically distributed random variables that take only positive integer values. Their PMF is px (n) = py (n) = 2^n for every n e N, where N is the set of positive integers. 1. Fix at E N. Find the probability P

Math
A 3digit positive integer is selected at random. Find the probability that A) The last two digits of the number is 22 B) The number is greater than 900 C) The number is less than 100 D) The number contains at least one digit 8

Probability
1.Let π and π be two binomial random variables: a.If π and π are independent, then π+π is also a binomial random variable b.If π and π have the same parameters, π and π , then π+π is a binomial random variable c.If π

Math
John chooses a 5digit positive integer and deletes one of its digits to make a 4digit number. The sum of this 4digit number and the original 5digit number is 52713. What is the sum of the digits of the original 5digit number?

Maths
3. A three digit number is selected at random. What is the probability that its unit digit is 2

statistics
The results of a medical test show that of 66 people selected at random who were given the test, 3 tested positive and 63 tested negative. Determine the odds in favor of a person selected at random testing positive on the test.

mathematics, statistics
You observe k i.i.d. copies of the discrete uniform random variable Xi , which takes values 1 through n with equal probability. Define the random variable M as the maximum of these random variables, M=maxi(Xi) . 1.) Find the probability that Mβ€m , as a

STATISTICS
In the mass production of bolts it is found that 5% are defective. Bolts selected at random and put into packets of ten. A packet is selected at random. Find the probability that it contains (a) three defective bolts. (b) less than three are defective. Two

mathmath
A study conducted by the Metro Housing Agency in a midwestern city revealed the information below concerning the age distribution of renters in the city. (Round your answers to four decimal places.) Age Adult Population, % Group Who Are Renters, % 2144 53

statistics
A student council is made up of 4 women and 6 men. One of the women is president of the council. A member of the council is selected at random at random to report to the Dean of Student Life. What is the probability a woman is selected? What is the

Math
Let N be a positive integer random variable with PMF of the form pN(n)=12β nβ 2βn,n=1,2,β¦. Once we see the numerical value of N , we then draw a random variable K whose (conditional) PMF is uniform on the set {1,2,β¦,2n} . Write down an expression

Math
in a changing room, lockers are assigned the numbers 1,2,3,β¦, up to 99. If a locker is selected at random, find the probability that the locker number is A) a multiple of 5 B) a positive square number C) greater than 99

Math
Four hundred people apply for three jobs. 130 of the applicants are women. (a) If three persons are selected at random, what is the probability that all are women? (Round the answer to six decimal places.) (b) If three persons are selected at random, what

Math
If a positive twodigit integer is divided by the sum of its digits, the quotient is 2 with a remainder of 2. What is the twodigit integer?

statistics
The weights of pineapples grown are approximately normally distributed with a standard deviation of 2.5 and mean of 31 ounces. Suppose a single pineapple is selected at random. a. If a single pineapple is selected at random, what is the approximate

algebra
Find two consecutive positive integers such that the sum of their squares is 85. n^2+(n+1)^2+2n = 85 n^2+n^2+2n+1=85 2n^2+2n=84 n^2+n=42 n^2+n42=0 (n6)(n+7)=0 n=6 n=7 Is my work and answer correct? 7 is not a positive integer. Your first equation is

statistics
An auditor of Health Maintenance Services reports 40 percent of policyholders 55 years and older submit a claim during the year. Fifteen policyholders are selected at random for company records. a)how many of the policyholders would you expect to have

finite math
suppose that 3 digits are selected at random from the set S={1,2,3,4,5,6} and are arranged in random order. Find the probability that the resulting 3digit number is less than 300.

Maths
A certain disease is present in 1 in 200 of the population.In a mass screening program quick test for the disease is used, but the test is not totally reliable. For someone who does have the disease there is a probability of 0.9 that the test will prove

Math
The tens digit of a twodigit positive integer is 2 more than three times the ones digit. If the digits are interchanged, the new number 13 less than half the given number. Find the given integer. (Hint: Let x = tensplace digit and y = onesplace digit,

MATH MODELS
300 hundred people apply for three jobs. 120 of the applicants are women. (a) If three persons are selected at random, what is the probability that two are women? (B)If three persons are selected at random, what is the probability that one is a woman? (c)

Algebra
If a positive twodigit integer is divided by the sum of its digits, the quotient is 2 with a remainder of 2. What is the twodigit integer?

math
i have no clue how to do this problem. any help would be appreciated!! : Three hundred people apply for three jobs. 90 of the applicants are women. (a) If three persons are selected at random, what is the probability that all are women? (Round the answer

stats again please help
When a computerized generator is used to generate random digits, the proability that any particular digit in the set {0,1,2, . . .,9} is generated on any individual trial is 1/100.1. suppose that we are generating digits one at a time and are interested

statistics
Find the indicated binomial probabilities. Round to the nearest 3 decimal places. In a local college, 20% of the math majors are women. Ten math majors are chosen at random. 1) What is the probability that exactly 2 are women? 2) What is the probability

math
Let S(N) denote the digit sum of the integer N. As N ranges over all 3digit positive numbers, what value of N would give the minimum of M=N/S(N)?

Statistics
In a population, heights of males are normally distributed with u=180 cm and sigma^2=16 cm^2, while the heights of females are normally distributed with u=170 cm and sigma^2= 25 cm^2. a) One random male and one random female are selected from the

statistics
The probability that a randomly selected person in the United States is lefthanded is about 0.14. (a) Among the 28 students in Mr. Millerβs class, 8 are lefthanded. Could this have happened by chance alone? Describe how you would use a random number

math
A fourdigit number is selected at random. What is the probability that its ones place is greater than its tens place, its tens place is greater than its hundreds place, and its hundreds place is greater than its thousands place? Note that the first digit

statistics
please help me on this; In the mass production of bolts it is found that 5% are defective. Bolts are selected at random and put into packets of ten. A packet is selected at random. Find the probability that it contains: A. no defective bolts, B. three

Stats
Among 15,378 Delta airline passengers randomly selected, 3 were bumped from a flight against there wishes (based on data from the us dept of transportation) find the probability that a random selected passenger is involuntarily bumped. Is such bumping

math
Rich chooses a 4digit positive integer. He erases one of the digits of this integer. The remaining digits, in their original order, form a 3digit positive integer. When Rich adds this 3digit integer to the original 4digit integer, the result is 6031.

maths
A 3 digit natural number is selected at random .Find the probability that it is divisible by 2 but not by 3?

Maths
A certain disease is present in 1 in 200 of the population.In a mass screening program quick test for the disease is used, but the test is not totally reliable. For someone who does have the disease there is a probability of 0.9 that the test will prove

Math
If the tens digit d is replaced with one of the digits 09, what is the probability that the fourdigit positive integer 12d4 is divisible by 12? Express as a common fraction.

math
Assume that 3 digits are selected at random from the set { 2, 5, 6, 8, 9 } and are arranged in random order. What is the probability that the resulting 3digit number is less than 900?

Finite Math
Assume that 3 digits are selected at random from the set {1,3,5,6,7,9} and are arranged in random order. What is the probability that the resulting 3digit number is less than 700? I know the sample space is P(6,3) but that is all I know. Help!

Math
If a positive twodigit integer is divided by the sum of its digits, the quotient is 2 with a remainder of 2. If the same twodigit integer is multiplied by the sum of its digits, the product is 112. What is the twodigit integer?

Algebra
Digit d is randomly selected from the set {1, 2, 3, 4, 5, 6, 7, 8, 9}. Without replacement of d, another digit, e is selected. What is the probability that the two digit number de is a multiple of 3

math
This is a statistics problem. A laboratory test for the detection of a certain disease give a positive result 5 percent of the time for people who do not have the disease. The test gives a negative result 0.3 percent of the time for people who have the

Math(Probability)
**Describe the outcome space** (a)If a Families that have three children each and select one such family at random. Describe the sample space S in terms of their children as 3tuple, agreeing for example that "gbb" would indicate that the youngest is a

MATH
Find the only positive integer whose cube is the sum of the cubes of three positive integers immediately preceding it. Find this positive integer. Your algebraic work must be detailed enough to show this is the only positive integer with this property

Math
In a table of random digits, each digit is to occur with a probability of 0.1. a) A student examines a list of 200 random digits and counts only eleven 4βs and thus claims that the table is not really random. Explain the error in the studentβs

Alegebra
Can some one please help me with this 3 problems I have a hard time with probabilities I'm studying for my midterm. Thank you 1) Urn A has balls numbered 1 through 7. Urn B has balls numbered 1 through 5. A ball is selected at random from urn A and then a

stats please help test tom
When a computerized generator is used to generate random digits, the proability that any particular digit in the set {0,1,2, . . .,9} is generated on any individual trial is 1/100.1. suppose that we are generating digits one at a time and are interested

Statistics/Probability
In the production of a particular model of cell phones, it is found that 5% are defective. Cellular phones are selected at random and put into boxes of 10. If a box is selected at random, find the probability that it contains. (i) Exactly three defective

math
500bottles contains 10 bottles that are defective.3bottles are selected,random,without replacement.a)what is the probability that the third one selected is defective given that the first was okay and second one selected was defective?b)what is the

math
Let S(N) denote the digit sum of the integer N. As N ranges over all 3digit positive numbers, what value of N would give the minimum of M=NS(N)?

Math
3) Erik wants to form 4digit integers using only the digits 1, 2, 3, and 4. He is allowed to repeat digits. What is the probability that he forms a 4digit integer where at least one digit repeats? Express your answer as a common fraction.

statistics
37. A box whole, twored balls, if two balls are selected at random find the probability that a) one red and one white ball are selected b) two of the same color is selected c) no white balls are selected d) no read balls are selected

Statistics
A card is selected at random from a standard deck of cards. Find the probability of randomly selecting a king given that an ace has already been selected.

statistics
Find the indicated binomial probabilities. Round to the nearest 3 decimal places. In a local college, 20% of the math majors are women. Ten math majors are chosen at random. 1) What is the probability that exactly 2 are women? 2) What is the probability

statistics
The Better Businesss Bureau reports that they resolve 70% of the consumer complaints they receive. a) if a random sample of 5 consumer complaints is selected, what is the probability that all 5 were resolved? b)if a random sample of 5 consumer complaints

math
2) In a certain instant lottery game, the chances of a win stated as "3 in 23". Express the indicated degree of likelihood as a probability value between 0 and 1 3) A certain company reduced its management staff from 20 managers to 16. The company claimed

Probability
You observe π i.i.d. copies of the discrete uniform random variable ππ , which takes values 1 through π with equal probability. Define the random variable π as the maximum of these random variables, π=maxπ(ππ) 1a. Find the

Biostatstics
Question: The New York State Health Department reports a 10% rate of the HIV virus for the βatriskβ population. Under certain conditions, a preliminary screening test for the HIV virus is correct 95% of the time. (Subjects are not told that they are

math and numbers
What is the probability that a randomly selected threedigit number has the property that one digit is equal to the product of the other two? Express your answer as a common fraction.

statistics
Can you help me with this statistics problem? A company requires all employees to take drug test. The company can afford only the inexpensive drug test the one with a 5% falsepositive rate and a 10% falsenegative rate. (This means that 5% of those who

Math
A department store is holding a drawing to give free shopping sprees to two lucky customers. There are 15 customers who have entered the drawing: 4 live in the town of Gaston, 6 live in Pike, and 5 live in Wells. In the drawing, the first customer will be

mathematics
How many 4digit falling numbers can we make from decimal digits? (A falling number is a positive integer where each digit is larger than the one to its right.)

Math
Twice the sum of the digits of a positive, twodigit integer is 19 greater than the ones digit. Reversing the digits decreases the number by 18.

probablity
In this problem, you may find it useful to recall the following fact about Poisson random variables. Let X and Y be two independent Poisson random variables, with means Ξ»1 and Ξ»2, respectively. Then, X+Y is a Poisson random variable with mean Ξ»1+Ξ»2.

Statistics
A box contains five numbered balls (1,2,2,3 and 4). We will randomly select two balls from the box (without replacement). (a) The outcome of interest is the number on each of the two balls we select. List the complete sample space of outcomes. (b) What is

math
If a student is selected at random, find the probability a)

Algebra
Let S(N) denote the digit sum of the integer N. Let M denote the maximum value of N/S(N), where N is a 3digit number. How many 3digit numbers N satisfy N/S(N)=M? The digit sum of an integer is the sum of all its digits. For example, the digit sum of

math
Two cards are selected at random without replacement from a wellshuffled deck of 52 playing cards. Find the probability of the given event. (Round your answer to three decimal places.) find the probability that A pair is not drawn.

math
if x is a positive integer, which of the following cannot be the units digit of 7^x? a) 1 b) 3 c) 5 d) 7 e) 9 and why?

math *IMPORTANT
HENRY PROGRAMMED A CALCULATOR TO RANDOMLY DISPLAY A DIGIT FROM 0 THROUGH 9. THE RESULTS OF THE FIRST 50 DISPLAYS ARE SHOWN ON THE TABLE BELOW. WHAT IS THE POSITIVE DIFFERENCE BETWEEN THE THEORETICAL PROBABILITY AND EXPERIMENTAL PROBABILITY FOR GETTING A 9

mathematical physics
Out of 90 applicants for a job, 60 people get selected after the interview. If five applicants are selected at random,calculate the probability that 2 will get selected.

math
Let k be a positive integer and let X be a continuous random variable that is uniformly distributed on [0,k]. For any number x, denote by βxβ the largest integer not exceeding x. Similarly, denote frac(x)=xββxβ to be the fractional part of x. The

MathPLEASE HELP!!!
Let's begin with a rather straightforward lottery in which players select four digits. The winning number is commonly selected in the following fashion: 10 Ping Pong balls (each with a digit 0 through 9 written on it) are placed in a hopper. One Ping Pong

Math (Algebra)
Given a positive integer n, let S(n) denote the digit sum of n. Consider the sequence of numbers given by nβ = S(n) nk = S(nkβ1)kβ₯2 For how many positive integers n β€ 2013 does the sequence {nk} contain the number 9?

maths
Given a positive integer n, let S(n) denote the digit sum of n. Consider the sequence of numbers given by nβ = S(n) nk = S(nkβ1)kβ₯2 For how many positive integers n β€ 2013 does the sequence {nk} contain the number 9?

college
Four hundred people apply for three jobs. 130 of the applicants are women. (a) If three persons are selected at random, what is the probability that all are women? (b) If three persons are selected at random, what is the probability that two are women?

Calculus
Digit d is randomly selected from the set {1, 2, 3, 4, 5, 6, 7, 8, 9}. Without replacement of d, another digit, e is selected. What is the probability that the two digit number de is a multiple of 3?

statistics
The average age of statistics students nationwide is 22. The standard deviation is 2.5 years. Assume the age is a normally distributed variable. Find the probability that one student selected at random is older than 23. Find the probability that the mean

Pre Calc
in a 9 digit integer, each of the digits 1,2,3,4,5,6,7,8,and 9 appears exactly once. Find the probability that the integer is divisible by 9.

probability
A test for a certain rare disease is assumed to be correct 95% of the time: if a person has the disease, the test result is positive with probability 0.95, and if the person does not have the disease, the test result is negative with probability 0.95. A

Probability II =)
You are shown five cards, Three have X written on them and two have Y. The cards are turned over so the X abd Y are no longer visible, and shuffled/ One card is picked and laid face up on the table. It is an X. If the remaining cards are shuffled and

Math
I need to show work for this but I don't know how. Erik wants to form 4digit integers using only the digits 1, 2, 3, and 4. He is allowed to repeat digits. What is the probability that he forms a 4digit integer where at least one digit repeats? Express

mathematics, probability, statistics
You observe k i.i.d. copies of the discrete uniform random variable Xi , which takes values 1 through n with equal probability. Define the random variable M as the maximum of these random variables, M=maxi(Xi) . 1.) Find the probability that Mβ€m , as a

Probability
Find the conditional probability. Suppose one card is selected at random from an ordinary deck of 52 playing cards. Let A = event a queen is selected B = event a diamond is selected Determine P(B[A) How do you go about solving this one? I know there are 4

math
What is the probability that a randomly selected threedigit number has the property that one digit is equal to the product of the other two? Express your answer as a common fraction.

Math
Webster Aquatic Center offers various levels of swimming lessons yearround. The March 2005 Monday and Wednesday evening lessons included instructions from Water Babies through Adults. The number in each classification is given in the table that follows.

algebra
Find a threedigit positive integers such that the sum of all three digit is i4, the tens digit is two more than ones and if the digit is reversed, the number is unchanged.

statistics
A certain defect (D) is present in about 1 out of 1000 cars during production [P(D)=0.001], and a program of testing is to be carried out using a detection device which gives a positive reading with probability 0.99 for a defective car [P(+/D)=0.99] and

statistics
1.a person selects a card from a deck .it is a red card ,he wns 1$.if it is black face card between or including 2 and 10,he wins $5.if it is black face card,he wins $10 and if it is black ace,he wins $100.find the expectation of the game is to be fair?

Statistics
In a shipment of 21 parts, four of the parts are defective. If three parts are selected at random without replacement, find the probability that : a.) All three parts selected are defective. 4/21*3/20*2/19=.003 b.) None of the tree parts selected are

mathematical physics
Out of 90 applicants for a job, 60 people get selected after the interview. If five applicants are selected at random,calculate the probability that 2 will get selected.

Math
I have a question; What is the probability that a selected letter from the alphabet of 26 letters is selected at random is "either a consonant OR a vowel"? This was my working out; 21/26 + 5/26 = 1 Is this correct?

statistics
If I selected one player at random what would be the probability of an NBA player in the Eastern conference being less than 6 feet tall? First calculate the zscore and then use the standard normal table to find the probability.

MathStatistics
Assume that 60% of community college students are female. 1) If we pick 10 students at random justify why we can or cannot model this using a normal model. 2) Find the probability that 8 of the 10 students selected are female. 3) Find the probability that

Algebra 2
n is 2 given that it is even directions: let n be a randomly selected integer from 1 to 20 find the indicated probability

Math
How do you solve: n is 2 given that it is even The directions say "let n be a randomly selected integer from 120. Find the indicated probability"

Statistics
A box contains three whole, two red balls, if two balls are selected at random find the probability that a) one red and one white ball are selected b) two of the same color is selected c) no white balls are selected d) no read balls are selected