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

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

Number of Children Probability
0	0.050
1	0.125
2	0.600
3	0.150
4	0.050
5	0.025

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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