Question

Find the indicated probability. A multiple choice test has 12 questions each of which has 5 possible answers, only one of which is correct. If Judy, who forgot to study for the test, guesses on all questions, what is the probability that she will answer exactly 3 questions correctly? A) 0.764 B) 0.00800 C) 0.236 D) 0.283

          Find the indicated probability.
A multiple choice test has 12 questions each of which has 5 possible answers, only
one of which is correct. If Judy, who forgot to study for the test, guesses on all
questions, what is the probability that she will answer exactly 3 questions correctly?
A) 0.764
B) 0.00800
C) 0.236
D) 0.283

Find the indicated probability.
A multiple choice test has 12 questions each of which has 5 possible answers, only
one of which is correct. If Judy, who forgot to study for the test, guesses on all
questions, what is the probability that she will answer exactly 3 questions correctly?
A) 0.764
B) 0.00800
C) 0.236
D) 0.283

Added by Tasha N.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Adi S

07/04/2024

Step 1

Since there are 5 possible answers and only 1 is correct, the probability of answering one question correctly is $\frac{1}{5}$, and the probability of answering one question incorrectly is $\frac{4}{5}$. Now, we need to find the number of ways Judy can answer Show more…

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