Question

The average of 25 numbers is 29 and that of other 15 numbers is 45. the average of all numbers together is?
1. 32
2. 37
3. 35
4. 36

Answer 1

Correct Answer - Option 3 : 35

GIVEN:

average of 25 numbers = 29

average of 15 numbers = 45

FORMULA USED:

average = sum of observations / total number of observations

CALCULATION:

sum of 25 numbers = 25 ×  29 = 725

sum of 15 numbers = 675

sum of all 40 numbers = 725 + 675 = 1400

required average = 1400/40 = 35

∴ the average of all numbers together is 35