isaiahhuettnerowgg8d
24.09.2019 •
Mathematics
What is the probability of a family with six children having 3 boys and 3 girls?
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Ответ:
each child could be either a boy or a girl ( 2 possibilities)
there are 6 kids so there are 2^6 ways to have a child
2^6 = 64 possible ways
now for 3 boys it is a combination 6C3 = 6*5*4*3*2/(3*2*3*2) = 720/36 = 20 ways to have 3 boys
so probability = 20/64 reduces to 5/16 probability
Ответ:
10 * -6 - (-6) * 2 + 2^3 =
-40