+0  
 
0
87
1
avatar

The Smith family was one of the first to come to the U.S. They had 6 children. Assuming that the probability of a child being a girl is 0.5, find the probability that the Smith family had:

at least 2 girls?

at most 5 girls?

 Jun 13, 2020
 #1
avatar
0

At least 2 girls =(6 nCr 2+6 nCr 3+6 nCr 4+6 nCr 5+6 nCr 6) = 57 / 2^6 =57 / 64

 

 

At most 5 girls =(6 nCr 5+6 nCr 4+6 nCr 3+6 nCr 2+6 nCr 1+6 nCr 0) / 2^6 =63/64

 Jun 13, 2020

19 Online Users

avatar