Average Practice Test 6

Question : 33 of 40

Marks: +1, -0

A family consists of grand parents, parents and three grand children. The average age of the grand parents is 67 years, that of the parents is 35 years and that of the grand children is 6 years. What is the average age of the family?

$32 1 /7$ years
$31 5 /7$ years
$30 5/ 7$ years
$29 1/ 7$ years

Validate

Solution:

Average age of family

={2×67+2×35+3×6}/6

=31 5/7

years.

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