Question

8. The Wilson 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 Wilson family had: at least 4 girls? at most 5 girls?

Answer 1

Total children = 6
1) Probability of 4 girls =4/6=0.66
Probability of at least 4 girls >_ 0.66

That is greater or equal to 0.66


2) probability of 5 girls = 5/ total children
=5/6=0.83
Probability of at most 5 girls <_ 0.83
That is less than equal to 0.83