Question

A class have 20 boys and 30 girls. The mean mark of girls in a test is 50 and that of boys is 40. The mean mark of the whole class is..?

1. 50
2. 40
3. 44
4. 45

Answer 1

Answer:

46

Step-by-step explanation:

Let the total marks of boys be B

Let the total marks of girls be G

B / 20 = 40

B = 800

G / 30 = 50

G = 1500

Mean mark of total class :-

(B + G) / 20 + 30

(1500 + 800) / 50 = 46.

The mean mark of the class is 46.

Answer 2

Answer:

1. 50 is the answer

hope it helps you