3.The results of a survey of 800 married couples and the number of children they had is shown below.

3.The results of a survey of 800 married couples and the number of children they had is shown below.
Number of ChildrenProbability
00.050
10.125
20.600
30.150
40.050
50.025
If a couple is selected at random, what is the probability that the couple will have
a.Less than 4 children?
b.More than 2 children?
c.Either 2 or 3 children?

 

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