Match I : Match II = 5 : 4 Match II : Match II = 2 : 1 = 4 : 2 ∴ Match I : Match II : Match III = 5 : 4 : 2 Acoording to the question 5x - 2x = 48 ⇒ 3x = 48 ⇒ x =
48
3
= 16 Total runs scored in three matches = 5x + 4x + 2x = 11x = 11x × 15 = 176 ∴ Required average =