Question

1. A question on a multiple-choice test has 10 questions each with 4 possible answers (a,b,c,d)....

1. A question on a multiple-choice test has 10 questions each with 4 possible answers (a,b,c,d).

a. What is the probability that you guess all the answers to the 10 questions correctly (earn 100%)?

Math   Statistics-And-Probability   
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Answer #1

X: number of correct answers.

X~bin (n,p)

where, n= 10

p = 1/4 = 0.25

q= (1-p) = (1-0.25)= 0.75

the pmf of the distribution be:-

a).the probability that i have guessed all the answers correctly be:-



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