Question 874888
Q:
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 60 %.
A:
Let X = number of correct answers
X ~ Binomial(10, 0.2)
P(X ≥ 6) = {{{sum((matrix(2,1,10,x))(0.2^x)(0.8^(10-x)), x = 6, 10)}}} = {{{highlight(0.00637)}}}