If a student is guesing randomly on a multiple choice test with 4 possible respo

Question

If a student is guesing randomly on a multiple choice test with 4 possible responses per question, and 16 questions: What is the probability of getting 3 correct? QUESTION 13 If a student is guessing randomly on a multiple choice test with 4 possible responses per question, and 16 questions: What is the probability of getting 3 incorreet? If a student is guessing randomly on a multiple choice test with 4 possible responses per question, and 16 questions What is the probability of getting AT LEAST 3 correct? Click Save and Submi to save and subrrit Ciek Save All Asir to sau all

Explanation / Answer

If there are four possible responses, one of them would be correct and hence p=0.25, q=0.75 (incorrect). We would be using the below formula: -

n!/x!(n-x)!*p^x*q^n-x

12)

n=16, x=3, p=0.25

0.2079= prob

13)

n=16, x=3, p=0.75

0.0000035204= prob

14)

n=16, x=3 or more until 16, p=0.25

0.8029= prob

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