Correct Answer - Option 2 : 1182
Given:
The average of five numbers = 612
The average of the first two numbers = 418
The average of the last two numbers = 521
Concept used:
Average = sum of elements/number of elements
Calculation:
Sum of all five numbers = 612 × 5 = 3060
Sum of first two numbers = 418 × 2 = 836
Sum of last two numbers = 521 × 2 = 1042
Sum of all five numbers = Sum of first two numbers + third number + Sum of last two numbers
3060 = 836 + third number + 1042
Third number = 3010 - 836 - 1042 = 1182
∴ The third number is 1182.