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Quantitative Aptitude

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Percentage & Averages

Question
10 out of 25
 

The average age of 80 girls in a class is 15 years. The average age of group of 15 girls in the class is 16 years. And the average age of another 25 girls is same class is 14 years. What is the average age of remaining girl in the class.



A 14.75
B 14.85
C 15
D 15.80
E None of these

Ans. B Total age of girls = 15 x 80 = 120 years

Age of remaining girl = 1200 – [(15x16)+(25x14)]

1200 – 606 = 594

Average =

Percentage & Averages Flashcard List

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