ibps-rrb-os1 2024 · Question 151 of 270
Percentage
According to the question, Cost price of 'x' articles = Rs. 80x Selling price of last article = 2 X x = Rs. '2x' {Since, selling price of first article is Rs. 2, second article is Rs. '4', third article is Rs. '6'} Now, 2 + 4 + 6 + .... + 2x = 1.5 X 80x Or, 2(1 + 2 + 3 + .... + x) = 120x Or, (2/2) X {x(x + 1) } = 120x Or, x2 + x = 120x Or, x2 -119x = 0 Or, x(x -119) = 0 Or, x = 119 Therefore, number of articles purchased by 'Bunti' = (x + 6) = 125 Required selling price = 1.8 x 125 x 40 = Rs. 9000
Source: IBPS RRB PO Prelims 2024 Memory Based Paper Shift 2 — Answer Key & Detailed Solutions (memory-based compilation, ixamBee) · memory-based
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