Question

When 2 is subtracted from each of the given n numbers, then the sum of the numbers so obtained is 102 . When 5 is subtracted from each of them, then the sum of the numbers so obtained is 12. What is the average of the given n numbers?

• A. 5
• B. 5.2
• C. 5.4
• D. 5.8

Answer 1

Answer:

C. 5.4

Sum of n numbers – 2n = 102 ….(i) Sum of n numbers – 5n = 12 …….(ii) 3n = 90 n = 30 (sum of n numbers) – 60 = 102 Sum of n numbers = 162 Average = 162/30 = 5.4