Question

In a mock test conducted by a coaching institute, 20 students average scored 75% marks and the remaining 15 students average scored 54% marks. Find the average score.

• A. 66 %
• B. 67 %
• C. 63 %
• D. 62 %

Answer 1

Answer:

A. 66 %

We use weighted average.

Total contribution of marks

• 20 students average = 75%

• 15 students average = 54%

$20 \times 75 = 1500$
$15 \times 54 = 810$

Total marks

$1500 + 810 = 2310$

Total students

$20 + 15 = 35$

Overall average

$\text{Average} = \frac{2310}{35} = 66$

Final Answer:

66%