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

45

Total marks of Section A = 60 × 32 = 1920

total marks of Section B  = 40 × 33 = 1320

Average marks for both Section A & B = \(\frac{1920 + 1320}{72}\)

                                                       = 45