Q.5 There are N boxes, each containing at the most, k balls. If the number of boxes containing at least j balls is Njfor j = 1, 2, 3, ... k, then the total number of balls contained in these N boxes is
Pankaj bought a bag with 20% discount on the original price. He got a profit of Rs. 50 by selling at 150% of the price at which he bought. What was the original price of the bag? Detailed solution please.
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