Question

Assume that random guesses are made for 5 multiple-choice questions on a test with 5 choices for each question, so that there are n=5 trials, each with probability of success (correct) given by p= 0.20. Find the probability of no correct answers

Find answer using the binomial probability table.

The probability of no correct answers is _____.

(Round to three decimal places as needed.)

Answer 1

PEN, Date solution Given the information, pa probability of sucess - 0:20. in 25 X number of correcto answer. x follows the Binomial distribution range of xis 0,1,2,3,4,5 -2020 we have to fond the probability that no correct answer.ie. to find PEx P(x=0) - we find these probability by using Binomial.pnt. C - P(x=x) = (2) -p" -q ayo, p+421 - a926 zozo-wi PIXEO) = 5). Coulejº(-0-2017 -5! ;(0-80 0! (5-0)! = 5 x 0.32768 1*0-32768 Pixeo) - 0-328 poobability that no correct answer i 3 0328.