The average of 5 quantities is 6. The average of 3 of them is 4. What is the average of remaining 2 numbers?

A) 9

B) 10

C) 8

D) 9.5

Given that the average of 5 numbers is 6, their sum is 5×6=30.

Given that the average of the 3 selected numbers is 4, their sum is 3×4=12

So the remaining two numbers add up to 30−12=18 and their average is 18/2=9

Related MCQs:
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  2. When a student weighing 45 kg left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students?
  3. If the average of five numbers is 6.92, then the sum of numbers is:
  4. If the average of 7 numbers is 40. What was the sum of the numbers?