Correct Answer - Option 1 : 10
Given:
Average of 25 numbers = 15
Average of first five numbers = 35
Concept used:
Average = Sum of observations/No. of observation
Calculation:
Let the average of remaining numbers be x, then
Sum of 25 numbers = Sum of first 5 numbers + Sum of remaining 20 numbers
⇒ (25 × 15) = (5 × 35) + 20x
⇒ 375 = 175 + 20x
⇒ 20x = 375 - 175
⇒ 20x = 200
⇒ x = 10
∴ The average of the remaining is 10.
