A researcher found that 55% of families in the United States have one child under the age of 21, 22% have two children under the age of 21,

A researcher found that 55% of families in the United States have one child under the age of 21, 22% have two children under the age of 21, 15% have three children under the age of 21, 5% have 4 children under the age of 21and 3% have 5 or more children under the age of 21. If a family is selected at random, what is the probability the family has at least 3 children under the age of 21? (Express your answer as a percent, Please include the % symbol.)

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  1. Answer:

    23% probability the family has at least 3 children under the age of 21.

    Step-by-step explanation:

    If a family is selected at random, what is the probability the family has at least 3 children under the age of 21?

    15% have three children under the age of 21

    5% have 4 children under the age of 21

    3% have 5 or more children under the age of 21.

    So:

    15% + 5% + 3% = 23%

    23% probability the family has at least 3 children under the age of 21.

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