Question

The arithmetic mean of 5 numbers is 27. lf one of the number is excluded the mean of the remaining number is 25. Find the excluded number.

• A. 27
• B. 25
• C. 30
• D. 35

Answer 1

The correct option is D 35

Sum of 5 numbers =27 $\times$ 5 =135
When one of the numbers is excluded.
Sum of remaining 4 numbers = 4 $\times$ 25 = 100
Excluded number = 135 -100 = 35.