Question

The average 6 numbers is 103. If the average last 4 numbers is 102, what will be sum of first 2 numbers? 

1. 170
2. 210
3. 300
4. 420

Answer 1

Correct Answer - Option 2 : 210

Given:

Average 6 numbers = 103

Average of last 4 numbers = 102

Concept:

Sum of first two numbers = Total of 6 numbers ─ Total of last 4 numbers

Calculation:

Total of 6 numbers = (103 × 6) = 618

Total of last 4 numbers = (102 × 4) = 408

∴ total of first 2 numbers = (618 ─ 408) = 210