Math

A true-false test has 5 questions. What is the probability of guessing the correct answers to all of the questions?

A. 1/25****
B. 1/10
C. 1/32
D. 1/7

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  1. Prob(Right) = 1/2

    In 5 problems you want RRRRR
    prob(RRRRR) = (1/2)^5 = 1/32

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    Reiny
  2. 2*2*2*2=2^5..... By multiplying 2 Five times and and the root number 5... the probability of answering ll of them correct is 1/23.

    : )

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