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Quantitative Aptitude

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Percentage & Averages

Question
8 out of 20
 

In a class the average age of girl is 14 years and that of boy is 12 years. The number of boys is 8 more than the number of girls. What is the average age of all students in the class?



A 45
B 36
C 24
D can’t determine
E None of these

Ans. D Let the girls be x so boy will be (x+8)

So average age of all student be

14x + 12(x+8), 26x + 96

So cannot determine

Percentage & Averages Flashcard List

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