2.1000familieswith2childrenweresurveyed,andthefollowingdatawererecorded:
Numberofgirlsinafamily 0 1 2
Numberoffamilies 111 614 275
Ifafamilyischosenatrandom,computetheprobabilitythatithas:
a)exactly1girl
b)exactly2girls
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Answer:
Exactly 1 girl 12+111+614+275+
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