MATH Prob.

posted by .

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. -

    The probability of getting the correct answer is 1/2

    The probability of getting 4 correct in a row, to make a perfect on a 4 question test, can be found by (1/2)^4, or 1/16.

    What do you think the probability of getting a perfect on a 10-item test?

  • MATH Prob. -

    (1/2)^10= 1/1024?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. 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 …
  2. Math

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

    Could someone please tell me if I am on track with my answer?
  4. college math

    Can someone just tell me the formula to use for this problem?
  5. MATH 157

    Can anyone please help me understand these math problems. #4. How many three-symbol codes (letter-number-number)can be made from the letters S, P, Y, and two-digits from the set of (0, 1, 2,..., 9) without repetition?
  6. Stats

    A test has 15 true or false questions and 10 multiple choice questions (each with 4 choices). All questions are weighted equally. Jack has not studied at all for the test and randomly guesses. 1. What is the probability that Jack gets …
  7. tats

    No(Did not lie) Yes(lied) positive test result 15(false positive) 42(true positive) negative test result 32(true negative) 9 (false negative) Refer to table and assume that one of the 98 test subjects is randomly selected. Find the …
  8. math

    A true-false test consists of 15 items. (b) What is the probability that Chris gets 80% or more for the test?
  9. math

    A true-false test consists of 15 items. (a) If Chris does not study at all and guesses each and every item in the test, describe the probability model for the number of correct guesses. (b) What is the probability that Chris gets 80% …
  10. math

    A true-false test consists of 15 items. (a) If Chris does not study at all and guesses each and every item in the test, describe the probability model for the number of correct guesses. each individual question has a probability of …

More Similar Questions