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Quantitative Aptitude

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Percentage & Averages

Question
2 out of 30
 

A class has two sections in one of which there are 40 students with an average age of 14. 5 years. The average of the whole class is 14. 2 years. If there be 32 students in the other section, its average age is



A 13.525 years
B 13.625 years
C 13.725 years
D 13.850 years
E None of These

Ans. E 72 x 14.2 = 40 x 14.5 + 32 x X

1022.4 = 580 + 32x

32x = 1022.4 – 580

X = 13.825

Percentage & Averages Flashcard List

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