Assume that the probability of a boy being born is the same as the probability of a girl being born. Find the probability that a family with four children will have the given composition. (Enter your answer to four decimal places.)
At least one girl
Easiest method:
OR
You can use the BINOMCDF function on a TI-83/84 graphing calculator.
OR
The BINOMDIST function in MS Excel.
BTW: 4 births result in 24 = 16 outcomes.