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The following table shows the probability distribution for the number of books a student typically buys at the annual book fair held at an elementary school.
Number of Books
0
1
2
3
4
5
6
7
Probability
0.35
0.20
0.15
0.10
0.07
0.08
0.04
0.01
Let the random variable B represent the number of books a student buys at the next book fair. What is the expected value of B?
A
0
B
1.00
с
1.79
D
3.50
E
28
acer
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