The average marks of $125$ students is $29$. If the average marks of passed students is $36$ and that of failed students is $11$, the number of failed students is:
Practice this question from Chapter Mock 6: Average and Ages, with options and an explanation.
Question
The average marks of $125$ students is $29$. If the average marks of passed students is $36$ and that of failed students is $11$, the number of failed students is:
Option A
25
Option B
30
Option C — Correct answer
35
Correct choice.
Option D
40
Explanation
Number of failed students $=\frac{125(36-29)}{36-11}=\frac{875}{25}=35$.