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Quantitative Aptitude

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Percentage & Averages

Question
29 out of 30
 

Out of four numbers, the average of the first three is 16 and that of the last three is 15. If the last number is 18, the first number is



A 20
B 21
C 23
D 25
E None of These

Ans. B A+B+C = 48

B+C+D = 45

B + C = 45 – 18 = 27

A + 27 = 48

A = 21

Percentage & Averages Flashcard List

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