The average marks of the students of a class are 55. What is the number of students in the class if the sum total of marks of all the students in the class is 3575?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 65
The average is the total divided by the number of students, so the number of students is the total marks divided by the average.
Average \(\times\) number of students \(=\) total marks, so \(55\times n=3575\)
Number of students \(\displaystyle n=\frac{3575}{55}=65\)