Question

Average marks of a student in first 4 terminal exam is 45 and the average of first 2 terminal exam is 75. Find the average of last 2 terminal exam.
1. 14
2. 16
3. 17
4. 15

Answer 1

Correct Answer - Option 4 : 15

Given:

Average of first 4 terminal exam = 45

Average of first 2 terminal exam = 75

Calculation:

Sum of marks in first 4 terminal exam = 45 × 4

⇒ 180

Sum of marks in first 2 terminal exam = 75 × 2

⇒ 150

Sum of marks in last 2 terminal exam = 180 – 150

⇒ 30

Average marks of last 2 terminal exam = 30/2

⇒ 15