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Mean Number of Robin's Eggs

APSTAT-PN2XJL

Researchers have been observing robins' nests for many years to record the number of eggs robins will lay at one time. Shown below is the probability distribution.

X (# of eggs) 2 3 4 5
p(X) 0.18 0.41 0.39 0.02



Based upon this distribution, what is the mean number of eggs that a robin will lay at one time?

A

$2$

B

$3$

C

$3.25$

D

$3.5$

E

$4$