Answer
20.
Work Step by Step
Out of 5 answers, the probability of guessing the correct one randomly is:$\frac{1}{5}=0.2$. n=100, therefore mean$=n \cdot p=100 \cdot 0.2=20.$
Elementary Statistics (12th Edition)
by Triola, Mario F.
Published by
Pearson
ISBN 10:
0321836960
ISBN 13:
978-0-32183-696-0
Chapter 5 - Discrete Probability Distributions - Review - Chapter Quick Quiz - Page 236: 2
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