A group consists of 3 males, 3 females and 5 children. The average age of the males is 50 years, of the females 45 years and of the children 10 years. What is the approximate average age of the group?
A32.5
B30.45 ✓ Correct
C28.45
D31.45
Correct answer: (B) 30.45
Explanation
The group average is about 30.45 years.
Males: 3 x 50 = 150; females: 3 x 45 = 135.
Children: 5 x 10 = 50.
Total age = 150 + 135 + 50 = 335 over 11 people.
Average = 335 / 11 = 30.45.
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