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Let maximum marks = 100x ∴ 34x + 80 = 36x + 64 => 2x = 16 => x = 8 ∴ Max marks = 100x = 800 ∴ Minimum percentage marks to be pass = {[(34×8) + 80]/800} × 100 = 44%
The difference between the compound interest compounded annually and simple interest of a sum at 18% p.a. for 2 years is Rs. 324. Find the sum.