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Question
1800 families with 2 children were selected randomly and the following data were recorded:
| No. of girls in a family | 2 | 1 | 0 |
| No. of families | 700 | 850 | 250 |
Computer the probability of a family chosen at random having: 1 girl.
Solution
Total number of families
n(S) = 1800
Event = { 1 girl }
n(E) = 850
P(E) = ?
P(E) = `"n(E)"/"n(S)" = 850/1800 = 17/36`.
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