Question

The average marks of 32 boys of section A of class:X is 60 whereas the average marks 40 boys of section B of class X is 33. The average marks for both the sections combined together

• A. 44
• B. 45
• C. 46 1/2
• D. 45 1/2

Answer 1

Answer:

B. 45

Assumed mean = 30. Excess = 32 x 30 + 20 x 3 =1080, Excess average = 1080 ÷ 72 = 15 = Actual mean = 30+15=45