The average marks of 23 girls of section A of class 12th is 65 whereas the average marks of 35 girls of section B of class X is 30.2 . The average marks for both the sections combined together is:

44

Total marks of Section A = 65 × 23 = 1495

Total marks of Section B  = 35 × 30.2 = 1057

Average marks for both Section A & B = \(\frac{1495 + 1057 }{58}\)

                                                       = 44