Families 2

Seven hundred twenty-nine families are having six children each. The probability of a girl is 1/3, and the probability of a boy is 2/3. Find the number of families having two girls and four boys.

Correct answer:

n =  240

Step-by-step explanation:

C2(6)=(62)=6!2!(62)!=6521=15  p=(62) (13)2 (23)4=15 (13)2 (23)4=802430.3292  n=729 p=729 0.3292=240



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Showing 2 comments:
#
Math student
The correction notation is p = 6 combination 2 and not 2 combination 6

#
Matematik
Thanks, we just exange 6 and 2

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