Question 348457
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?
1-(0.050+0.025) = 0.925
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b. More than 2 children?
1-[0.05 + 0.125] = 0.82.5
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c. Either 2 or 3 children?
0.60+0.15 = 0.75
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Cheers,
Stan H.