Question
In an examination, Aman secured
40% more marks than Bittu, while Bittu scored  less than Charu. If the combined marks of Aman and Dinesh total 60, determine the difference in marks between Bittu and Charu, knowing that Charu obtained 12.5% more marks than Dinesh.Solution
ATQ,
Let marks of B = 5x So, marks of A = 5x × 1.4 = 7x B got 44(4/9)% less than C → B = C × (5/9) ⇒ C = 5x × (9/5) = 9x C got 12.5% more than D → C = D × (9/8) ⇒ D = 9x × (8/9) = 8x Now, A + D = 60 ⇒ 7x + 8x = 60 ⇒ 15x = 60 ⇒ x = 4 Difference between C and B = 9x – 5x = 4x = 4 × 4 = 16
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