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Holly is taking a multiple-choice reading test. She has decided to guess on questions 3 and 7. On each question, there are four worded choices plus an "all of these" choice and a "none of these" choice. What is the probability that she answers question 3 incorrectly and question 7 correctly?

A. 1/3

B. 5/36

C. 3/16

D. 4/25

 Jun 17, 2020
 #1
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There are 6 choices for each question; one of which is correct.

 

To get 3 incorrect:  5/6

To get 7 correct:     1/6

 

To get e incorrect  and  7 corect:  (5/6)  x  (1/6)  =  5/36.

 Jun 17, 2020

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