# Expected number and variance

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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?

Â© BrainMass Inc. brainmass.com March 4, 2021, 6:03 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.

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