Question 402160
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.
-----
Binomial Problem with n = 20 and p = 1/4
---
P(x = 4) = 20C4(1/4)^4*(3/4)^16 = 0.1897
=====================
Cheers,
Stan H.
----