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