# Expected number and variance

A couple decides to continue to have children until a daughter is born, what is the expected number of children of this couple? If there is a population with many such couples, what is the variance of the number of children per family in this population?

© BrainMass Inc. brainmass.com June 3, 2020, 5:27 pm ad1c9bdddfhttps://brainmass.com/statistics/central-tendency/expected-number-variance-26796

#### Solution Summary

The solution calculates the expected number of children and variance of the number of children per family for a population of couples that decide to continue to have children until a daughter is born.

$2.19