Mathematics, 14.12.2021 01:50, Nicolegrove7927

Step-by-step explanation: If you use the formula P(r)=nCrP^rq^n-r.

P is the probability of success = .25

n is the total number of questions = 8

r is the total number of questions that Johnni got correct = 3

q is the probability of getting an answer wrong = .75

Plug all of these values into the formula, and you should get roughly .208.

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Step-by-step explanation: If you use the formula P(r)=nCrP^rq^n-r.

P is the probabili...