Question

Previous Problem List Next (1 point) A quiz consists of 10 multiple-choice questions, each with 5 possible answers. For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing grade is 50 %. P(pass) =

Answer 1

Solution :

This is binomial with,

p = 0.2 , n = 10

P(X $\geq$ 5)

= 1 - BINOM.DIST(4,10,0.2,TRUE) [Excel formula]

= 0.0328

P(pass) = 0.0328