Question

In an exam, the average marks for 80 students of Class V is 35. The average of marks in section A of the class is 55 while the average of marks in section B is 30. Find the number of students in Class V B.

Answer 1

There are 64 students in class VB.

Step-by-step explanation:

Let there be x students in class VA. Then there are (80 - x) students in class VB.

Total marks of class VA is 55x and that of class VB is 30(80 - x).

Given that the average marks for 80 students in class V is 35.

Then total marks is

= 80 × 35 = 2800

We can form an equation satisfying the total marks 2800, as follows-

55x + 30(80 - x) = 2800

or, 55x + 2400 - 30x = 2800

or, 25x = 400

or, x = 16

Therefore there are (80 - 16) = 64 students in class VB.

Answer 2

Answer:

Heya!!

Explanation:

Please refer to the attachment!!