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Let the amount invested at 20% p.a. compound interest be Rs. ‘x’ The amount invested at 12% p.a. simple interest = Rs. (5200 – x) According to the question, [x × {1 + (20/100)}3 – x] + (5200 – x) × 12% × 3 = 2976 Or, (216x/125) – x + 1872 – (9x/25) = 2976 Or, (91x/125) – (9x/25) = 1104 Or, (46x/125) = 1104 So, x = 3000 Amount invested at 20% compound interest = Rs. 3,000
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
42 * 7 * 64 * 11 * 6 *4
((67)32 × (67)-18/ ? = (67)⁸
(750 / 15 × 15 + 152 + 20% of 125) = ?3
(180 ÷ 22 ) ÷ (60% of 30) = (? ÷ 2)
√38809 × √3249 – (91)2 = (?)2 + (50)2 – 36
[(36 × 15 ÷ 96 + 19 ÷ 8) × 38] = ?% of 608
20% of 450 - 15% of 400 = 25% of ?