If a student randomly guesses at 20 multiple-choice questions, find the probability that the student gets exactly four correct. Each question has four possible choices.
A) 0.19
B) 0.17
C) 0.08
D) 0.23

Question

Quizplus · Accepted Answer

The probability of getting exactly four correct answers out of 20 multiple-choice questions, each with four possible choices, can be calculated using the binomial distribution. The probability is given by:P(X = 4) = (20 choose 4) * (1/4)^4 * (3/4)^16= 4845 * 1/256 * 43046721/65536= 0.19

If a Student Randomly Guesses at 20 Multiple-Choice Questions, Find