Question

The average of 25 students' score is 68. If the score got by 10 Students are subtracted then the average decreased by 13. Find the average score of removed students.

1. 92.5
2. 87.5
3. 82.5
4. 90
5. None of these

Answer 1

Correct Answer - Option 2 : 87.5

Given:

Average of 25 students score = 68

Concept Used:

Average = Total/Number

Calculation:

Average = Total/Number

⇒ 68 = Total/25

⇒ Total = 1700

Remaining students = 25 – 10 = 15

Let the score got by 10 students be x.

Then the total score of these 10 students = 10x

Average = Total/Number

⇒ 68 – 13 = (1700 – 10x)/15

⇒ 55 × 15 = 1700 – 10x

⇒ 1700 - 825 = 10x

⇒ x = 875/10

⇒ x = 87.5

∴ The average score of removed students is 87.5.