math

your social security number is a 9 digit number. suppose that the last 4 digits are chosen randomly from the number 0-9.

a. how many sequences are possible for the last 4 digits?

b. what is the probability of getting 5 or 0 in the last digit.

c. what is the probability of getting two 5's in the last two digits?

  1. 👍
  2. 👎
  3. 👁
  1. a.) 0000 through 9999 = 10,000 possibilities
    b.) 1/10 + 1/10 = 1/5
    c.) 1 (55) out of 100 (00 through 99)

    1. 👍
    2. 👎
  2. for a i thought you were supposed to do 9*8*7*6 and the answer that i got was 3,024.

    for b i got 9*8=72

    for c i got 9*9=81

    does that make sense

    1. 👍
    2. 👎
  3. The numerals get smaller if you are considering probabilities without replacement. In other words, using a numeral in one position would prohibit its use in other positions. However, the use of any numeral does not effect the probabilities of the remaining numerals.

    I hope this helps a little more. Thanks for asking.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    In a three digit number, the hundreds digit is twice the units digit. If the digits are reversed, the new number is 396 less than the original number. Find the number.

  2. Math

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

  3. Math

    Solve the mathematical puzzle. Determine the digits of R from these clues. The first digit is the answer when the third digit is divided by 2. The second and third digits add to 7. The second digit minus the first digit is 1. R is

  4. Math

    A Two Digit Number is such that the sum of the ones digit and the tens digits is 10.if the digits are reversed the number formed exceed the original number by 54,find the number?

  1. Math

    A social security number consists of nine digits. How many different social security numbers are possible if repetition of digits is permitted? Oh goodness, I'm not sure what number to start with :(

  2. Math

    The sum of digits of a three-digit number is 14, and the ten's digit of the number is one more than the unit's digit. If the digits were reversed in order, the new number is 198 more than the original. What is the original number?

  3. math-probability

    A state lottery has a daily drawing to form a four-digit number. The digits 1 through 9 are randomly selected for each of the four digits. For each selection any one of the digits 1 through 9 are possible. What is the probability

  4. linear equation in one variables

    Sum of the digits of a two- digit number is 9. When we interchange the digits, it is found that the resulting new number is greater than the original number by 27. What is the two- digit number?

  1. math

    The number has 6 digits. The nuber is less than 300000. 10 is a factor of the number. The hundred thousands and ten thousands digit are the same and are odd. The tens digit is a cube number and is one more than the thousands

  2. Maths

    The difference between the digits of a two digit number is 1.The number itself is 1 more than 5 times the sum of its digits.If the units digits is greater than the tens digit,find the number.

  3. Math

    sum of the digits of a three-digit number is 20. If the hundreds and unit digits were interchanged, the resulting number is 297 less than the original. Find the number if the hundreds digit exceeds the tens digit by one.

  4. Mathematics-Algebra PLEASE HELP,PLEASE!!!!!!!

    In a two-digit number, the tens’ digit is 1 less than the units’ digit. If the digits are interchanged, the sum of the number obtained and the original number is 143. Find the number.

You can view more similar questions or ask a new question.