# Math/Prob

136,377 results

### math

the probabilities that 3 friends A,B andC pass a driving test are1/3,1/4,2/5 respectively.All 3 take the test find the probability that(a)aa 3 failed the test (b) only B passes the test(c) only 2 of them pass the test (d)at least 1 passes the test... I will do one. Assuming ...

### Math

How do I work this math prob. I always have a B and would like to bring it up. Caan you PLEASE help me with this prob. on unit rates "$2 for 5 cans of tomato soup"

### stats

a test consists of 25 multiple choice questions. Each has 5 possible answers, which only one is correct. If a student guesses on each question, find the following: a) prob that he will guess all of them right b)prob that he will guess at most 12 right c) prob that he will ...

### math- algebra- help please!

3 dice are rolled let (y,r,b) represent each outcome? a- sample space b- prob rolling a sum of 18 c- prob of rolling a sum less than 5

### statistics

Use the normal dist to approx the desired prob. Find the prob of getting at most 30 fives in 200 tosses of a fair 6 sided die

### Statistics

How do I plug this into the Binomial Probability Formula? prob(lost) = 5/1000 = 1/200 prob(not lost) = 199/200 prob( 2 of 22 are lost) = C(22,2) (1/200)^2 (199/200)^20 = .005224..

### data management gr.12

In a bag there are 8 red jelly beans and 7 green jelly beans. The 4 jelly beans are randomly chosen from the bag without replacement. a)create a probability distribution table for choosing red jelly beans b)what is the probability that at least 2 chosen jelly beans are green ...

### Linear algebra

In a medical prognosis model, there are three states for a person: well, ill and dead. We are given that the prob. one states well given that the person is well is 0.3. The prob. one becomes ill given that one is well is 0.5. The prob. one states ill given that one is ill is 0...

### algebra

Prob.1: -14=2x+2x-2 Prob.2: 5x=50

### Statistics

DIAGRAMS MUST BE DRAWN Given the standard normal distribution, determine:Prob Z greater than 1.50 Prob Z between1.06 and 1.96 Given the standard normal distribution determine the Z values that contain 80% in the middle of the curve.

### math

dale placed six cARDS IN A BAG.QONE CARD IS LABELD 1,TWO CARDS ARE LABELD2,AND RTHREE CARDS ARE LABELD 3.FIND THE PROBABILITY OOF PICKING TWO CARDS IN THE ORDER OF THE NUBERS LISTED TH EFIRST CARD IS RETURNED BEFORE THE SECOND IS PICKED ..... P,(1,2) P(3,NOT1) p(NOT2,2) P(1,3...

### Probability and Statistics (Continuation)

Assume 10% of the engines manufactured on an assembly line are defective. If engines are randomly selected one at a time and tested. What is the probability that the third nondefective engine will be found a)on the fifth trial? b) on or before the fifth trial? MY answers: a) P...

### STATISTICS

PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS THE PROB. THAT MORE ...

### statistics

PINWORM INFESTATION COMMONLY FOUND IN KIDS CAN BE TREATED WITH THE DRUG PYRANTEL PAMOATE. RESEARCH SHOWS THE TREATMENT IS EFFECTIVE IN ABOUT 90% OF CASES. DRUG IS ADMINISTERED TO 25 KIDS WHAT IS THE PROBABILITY THAT EXACTLY 23 OF THEM ARE CURED? WHAT IS THE PROB. THAT MORE ...

### statistics

Pinworm infestation commonly found in kids can be treated with the drug pyrantel pamoate. Research shows the treatment is effective about 90% of cases. The drug is administered to 25 kids. What is the probability that exactly 23 of them are cured? What is the prob. that more ...

### Prob & Stats

A medical researcher gave 100 patients a new drug to see if it reduces their blood pressure? Did the new drug reduce the patients' blood pressure? Write your hypothesis mathematically. Not sure how to do this, Prob & Stats has been quite a struggle for me

### math prob

how many midsegments does a triangle have?

### math

so the prob of drawn an ace or spade is 4/52

### Math Prob

ok for changing the base of a log from 10 to e is there a formula?

### Finance

Assuming that the returns from holding small-company stocks are normally distributed, what is the approximate probability that your money will double in value in a single year? What about triple in value. Many of my classmates have an expected return of 17.6% and a standard ...

### ECON! Please help!

Joe: y= 100 (High) prob = 2/5 =25 (medium) prob= 2/5 =0 (low) prob = 1/5 Calculate: 1. José’s risk premium, p, associated with farming and 2. José’s certainty equivalent associated with farming. The village decides to implement an informal insurance (risk sharing) ...

### math

okay i am comepletely stuck on this math prob....: x + 5y - 10 = 0 x = 2y - 8 i know the answer is -20/7 , 18/7 but i have no idea how they got it so someone PLZ HELP!!!!

### MATH Prob.

How many different ways can a teacher line up 5 students for lunch?

### Math- Prob Stat

How do you determine if a raffle or casino game is fair?

### statistics

Information given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641 i got it wrong...

### Stats

nformation given:the distribution of male head circumference (HC) is normal with a mean of 56cm and a standard deviation of 1.8cm first question -the prob that HC of a random chosen man is larger than 57.8cm is? Work: pr(x)>57.8cm z=(57.8-56)=1.8--->.9641 i got it wrong...

### MATH Prob.

How many three-symbol codes can be formed from the letters I, S, P, and Y without repetition?

### MATH Prob.

Three angles of a quadrilateral each measures 87*(degrees)..what is the measure of the fourth angle??

### MATH Prob.

What is the expected value of one 700 tickets in a raffle for a prize of $1400?

### MATH Prob.

how many three letter symbols can be formed from the letters A,C,K,L, & M without repetition? so far I have 12

### MATH Prob.

if you have two fair dice that are rolled, what is the probability of a sum 6 given that the roll is a 'double'?

### MATH Prob.

What are the odds in favor of getting at least one head in three successive flips of a coin?

### MATH Prob.

There are 6 contestants in a singing competition. How many different ways can first, second, and third place be awarded?

### math

am having prob..wv zs numb..given that f(x)=x+6/2x,find f(4) and f inverse(x) am not sure abt the answer the frst 1,i get 1.25 and the second oneeee i dnt knw hw to do it

### MATH Prob.

How many batting lineups of the nine players can be made for a baseball team if the catcher bats first, the shortstop second, and the pitcher last?

### math prob

Twelve people attend the first meeting of the Star Wars Club. They exchange e-mail addresses. How many exchanges take place?

### stats again

ok I get it, so once I get the prob figred for one person, how do I figure it if additional attempts are made and the question is about the prob of at least one of the additional attempts say n = 6 getting the same results as the first Once you have the probability of passing ...

### MATH Prob.

What are the odds in favor of drawing a spade and a heart if drawing from a deck of cards w/o replacement?

### MATH Prob.

A box contains 13 white cards numbered 1 through13. List the sample space of the event choosing one card with a number greater than 6.

### MATH Prob.

Find the probability of correctly answering the first 4 questions on a multiple choice test if random guesses are made and each question has 3 possible answers.

### MATH Prob.

There are 8 members on a board of directors. If they must form a subcommittee of 3 members, how many different subcommittees are possible?

### algebra

another prob(last one) 6x-7x=18

### MATH Prob.

When a single card is drawn from an ordinary 52-card deck, find the odds in favor of getting the 4 of spades.

### 11th grade

hi, i am haveing prob;ems with my math its called solving the quadratic equation but my teacher is not really giving me the attention i need to pass the class but will you help me please

### MATH Prob.

A 6-sided die is rolled. The sides contain the numbers 1,2,3,4,5,6. List the sample space of rolling one die.

### Prob/Stat

If P(A) = .3 and P(B) = .4 and P(AandB) = .2 what is P(A/B)? P(B/A)? Are A and B indepentent?

### quantum

prob 2 ans please?

### MATH Prob.

Find the probability of correctly answering the first 4 questions on a multiple choice test if random guesses are made and each question has 3 possible answers. A) 4/3 B) 1/81 C)1/64 D)3/4 I automatically think D.

### chemistry

So i if do 4 x250/100 i will get the answer for the prob?

### MATH Prob.

Determine whether the situation calls for a discrete or continuous random variable. A)the cost of a random selected orange B)the Ph level of shampoo

### MATH Prob.

Sam bought 1 of 250 tickets selling for $2 in a game with a grand prize of $400. Was $2 a fair price to pay for a ticket to play this game?

### MATH Prob.

A student asks, “What’s wrong with the argument that the probability of rolling a double 6 in two rolls of a die is 1/3 because 1/6 + 1/6 = 1/3?" Write an explanation of your understanding of the student’s misconception.

### math prob.

Through a mix-up on the production line, 6 defective refrigerators were shipped out with 44 good ones. if 5 are selected at random, what is the probability that at least 2 of them are defective? ty in advance!!

### Math (prob)

The probability of an outstanding student pass a biology test is 60%. If he takes three test,which are the experimental results for each test? Please, help me to understand.

### Math (prob)

The probability of an outstanding student pass a biology test is 60%. If he takes three test,which are the experimental results for each test? Please, help me to understand.

### SPELLING PLEASE help

the prob is: middle : center :: thinner : s _ _ _ _er

### PROB

What is minimum sample needed if you know the SD is 22.36 and an accuracy of 3.06 and you want a confidence level of 90%

### Prob

What is minimum sample needed if you know the SD is 22.36 and an accuracy of 3.06 and you want a confidence level of 90%

### MATH Prob.

You are dealt two cards successively without replacement from a standard deck of 52 playing cards. Find the probability that both cards are black.

### stats & prob.

Given the values of n=5, p= 0.15, and (1-p)=0.85, calculate the standard deviation of the data.

### probability!

we were given a chart - "researchers developed the following tabel of joint probabilities of number of drinks per day and development of ulcers" and the question is a. what proportion of people have ulcers - how am i supposed to know htis b. what is the prob that someone who ...

### math

I did it right but the paper saud im rong i think the paper is rong lol but the prob is 2(12-8x)=x-11x the answer i got is -6

### math

I did it right but the paper saud im rong i think the paper is rong lol the prob is 4(5n-7)=10n+2 the answer i got is -3

### MATH Prob.

If you select a card from an ordinary deck of 52 playing cards, what is the probability that a diamond is drawn and that a BLACK 10 or a BLACK 7 is drawn??

### MATH Prob.

How many 4-character license plates are possible with 2 letters from the alphabet followed by 2 digits, if repetitions are allowed? if repetitions are not allowed?

### math prob

A committee of 5 people is selected from a group of 7 men and 9 women. In how many ways can the committee be selected so it contains at least 1 woman?

### Math

Sorry again but I am terrible at math and I need help help writing this prob into an equation: 50 pounds of potato salad cost $39.50 and 50 pounds of bean salad cost $23.50. What was the difference in costs of the salads?

### MATH

if f(x)=x[x] / sin[x] then show that there is no existence of lim f(x) x>0 2nd prob: show lim (tanx-sinx)/x^3 =1/2 x>0

### prob.

If it is given that P(A)=1/3 and P(B/A)=2/3 (the dividing sign is ment to be a vertical bar), what is P(A and B). I got .07. Is this correct? If it isn't, why not?

### MATH Prob.

A ship carries exactly 10 different signal flags. If each possible combination and ordering of 4 of these flags connotes a specific message, how many signals can be sent with these flags, taken 4 at a time?

### math-binomial prob

I do not understand the binomial theorem. One of my questions is "there are 5 mutiple choice questions with 4 possible answers each. What is the probability of getting more than 3, exactly 3, and less than 3 correct?" Thanks for any help:)

### Algebra 2: Prob and Stats

Find the sample size that produces the margin of error +-4.0% a) 325 b) 25 c) 16 d) 625

### MATH Prob.

Estimate the number of personally constructed greeting cards possible at a machine if there are 12 designs, 30 messages, 18 closings, and 10 different paper stocks on which to print the card. Indicate how you made your estimate. How valid was your estimate?

### MATH Prob.

if a bag contains 8 red marbles, 6 blue marbles and 9 green marbles, what is the probability of choosing a blue marble??

### MATH Prob.

Two cards are drawn without replacement from an ordinary deck of 52 playing cards. What is the probability that the second card is a face card,if the first card was a queen?

### MATH Prob.

The number of accidents that occur at the intersection of Pine and Linden streets between 3 p.m. and 6 p.m. on Friday afternoons is 0, 1, 2, or 3, with probabilities of 0.84, 0.13, 0.02, and 0.01, respectively. Graph this probability distribution. What is the expected value ...

### Prob and Stats

In a multiple regression with 5 predictors in a sample of 56 U.S. cities, what would be the critical value for an F test of overall significance at a= .05? A. 2.45 B. 2.37 C. 2.40 D. 2.56

### Calculus

I'm having difficulty figuring #2 of this prob;em. I'm utterly clueless. Can someone explain it? Please and thank you. y=x 2. List the roots of the function.

### PLEASE HELP - DIVISORS PROB

What is the probability that a randomly selected divisor of 720 is a multiple of 4? Express your answer as a common fraction.

### MATH Prob.

A class elects two officers, a president and a secretary/ treasurer, from its 12 members. How many different ways can these two offices be filled from the members of the class?

### chem

I am having a hard time with the following : 50 g HCl + 50g Ca(OH)2=H2O+? amt of CaCl2? I don't know how to set this prob. up.Please HELP!Thank you in advance....

### math prob:(

a. Solve a – 9 = 20 b. Solve b – 9 > 20 c. How is solving the equation in part a similar to solving the inequality in part b? d. How are the solutions different?

### Math

Find the next three terms sequence. -2,-12,-72,-432,.... A. -1,728, -6,912, -27,648 B. -1,728, -10,368, -62,208*** C. -2,592, -10,368, -41,472 D. -2,592, -15,522, -93,312 ASAP is good, but if not no prob!

### Math

Question 1 : We would like to test 3 different treatments on a particu- lar type of plant. A worker at the local greenhouse will allow us to use 3 among 10 plants. Note: Each treatment will be used on one and only one plant. a) In how many different ways can we assign the ...

### mathematic

a bag contains 3rdmarbles, 2white and 3green a boy takes at one marble at random. what is the prob that it is either red or white?

### MATH Prob.

The game of dots is played by rolling a fair die and receiving $1 for each dot showing on the top face of the die. What cost should be set for each roll if the game is to be considered a fair game?

### Plz Help!I Need to find Hypotheses for prob.

If 3x - 7 = -4, then x = 1. Write the hypotheses of this statement

### MATH word prob!

how many gallons of 70% alcohol solution must be mixed with 30 gallons of 23% solution to obtain a solution that is 60% alcohol? How do I solve this problem?

### Prob and Stats

If X is a random variable with distribution X~N(350,110) find (a)P(X<400) and b)P(250<X<400)

### algebra

-720=x-9x plese explain to me how to do this prob step by step

### MATH Prob.

Jack is taking a four-item true–false test. He has no knowledge about the subject of the test and decides to flip a coin to answer the items. What is the probability that he receives a perfect score? What is the probability on a 10-item test?

### MATH Prob.

Five numbers are to be picked, without repetition, from 44 numbers to determine the winner of the Fortune Five game in the state lottery. If the order of the numbers is insignificant, how many different ways can a winning quintuple be selected? What is the probability of winning?

### MATH Prob.

a bag contains 7 red chips and 10 blue chips. Two chips are selected randomly without replacement from the bag. what is the probability that both chips are red??

### Prob. Math

Sarah draws a card from a deck of 52 cards. She receives 40 cents for a heart, 50 cents for an ace, and 90 cents for the ace of hearts. The cost of a draw is 15 cents. How much will Sarah lose if she plays this game?

### Prob&Stat

If 52% of the customers at a certain grocery store regularly use coupons, what is the approximate standard deviation of the sampling distribution of the proportion for samples of size 240? 2.1% 3.2% 4.7% 10.4%

### accounting ..urgent pls

can you help please.. PROB 1: A, B and C shared the profit of Rs. 9,00,000 in the ratio of 2:2:1 without providing for interest on B’s loan, B granted a loan of Rs. 4,00,000 in the beginning of accounting year. Where as the partnership deed is silent on the interest on loan ...

### prob

a music teacher wants to determine the music performances of students.a survey of wich group would produce a random sample

### math-story prob

Quinn is selling raffle tickets. The Ultra tickets cost $3 and the deluxe tickets cost $2. Quinn sold 89 tickets for $235. How many of each ticket did Quinn sell?

### math

topic tree diagram. a box contain 6red and 4blue,5white balls.there balls are the bag one after the other without replacement find the prob of obtaining 1 first the same colour 2 first blue 2nd red,than white. 3. 1st red. 4different colours