Question

Average of 5 numbers is 35. If two numbers which are 46 and 34 are replace with other two numbers then average is increased to 39. Find average of two new numbers.

1. 50
2. 40
3. 51
4. 49

Answer 1

Correct Answer - Option 1 : 50

Given:

Average of 5 numbers = 35

Concept used:

Average = Sum of elements/Number of elements

Calculation:

Total of 5 numbers = 35 × 5

⇒ 175

Total of 5 numbers after adding and removing = 39 × 5

⇒ 195

Total of new two numbers = 195 – 175 + 46 + 34

⇒ 100

So average of new two numbers is 100/2

⇒ 50

∴ Average of two numbers is 50