The average age of a family of five persons is 20 years. If the youngest member is 8 years old. What was the average age of the family at the birth time of the youngest member? |
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a) |
12 years |
b) |
15 years |
c) |
18 years |
d) |
16 years |

The average age of a family of five persons is 20 years. If the youngest member is 8 years old. What was the average age of the family at the birth time of the youngest member? |
|||||||

a) |
12 years |
b) |
15 years |
c) |
18 years |
d) |
16 years |

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