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Total number of families with two children= 1000
(i) Number of families having no boy child= 140
∴ Probality that a family chosen at random does not have a boy child
(ii) Number of families having one boy child= 560
∴ Probability that a family chosen at random has one boy child
(iii) Number of families having two boy children=300
∴ Probability that a
family chosen at random has two boys children
(iv) Number of family is having at least one boy child = 560 + 300 = 860
∴ Probability that family to generate random has at least one boy child
(v) Number of families having at most one boy child = 140 + 560 = 700
∴ Probability that family chosen at random has at most one boy child
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Total number of families with two children = 1000
(i) Number of families having no boy child = 140
∴ Probality that a family chosen at random does not have a boy child = 140/1000 = 0.14
(ii) Number of families having one boy child = 560
∴ Probability that a family chosen at random has one boy child = 560/1000 = 0.56
(iii) Number of families having two boy children = 300
∴ Probability that a family chosen at random has two boys children = 300/1000 = 0.3
(iv) Number of family is having at least one boy child = 560 + 300 = 860
∴ Probability that family to generate random has at least one boy child = 860/1000 = 0.86
(v) Number of families having at most one boy child = 140 + 560 = 700
∴ Probability that family chosen at random has at most one boy child = 700/1000 = 0.7
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