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The average of 9 persons age is 63. The average of 3 of them is 58, while the average of the other 3 is 60. What is the average of the remaining 3 numbers?

A81

B71

C78

D74

Answer:

B. 71

Read Explanation:

Sum of the remaining 3 numbers = [(9*63) – [(3*58)+(3*60)]] =567 – (174+180) =567 – 354 =213 Required average = 213 / 3 =71


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