Asked by Wei Liu
Out of 40 people, 17 have brothers, 22 have sisters and 9 have both. How many people have neither brothers nor sisters?
Answers
Answered by
mathhelper
Number (brothers OR sisters) = 17+22-9 = 30
but we had 40 people, so 10 had neither brothers or sisters
but we had 40 people, so 10 had neither brothers or sisters
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