Question
A sum of ₹15,000 is divided into two parts. One part
is invested at 10% simple interest per annum, and the other part is invested at 15% simple interest per annum. After 2 years, the total interest earned is ₹3,500. How much was invested at 10%?Solution
Let the amount invested at 10% be ₹x, and the amount invested at 15% be ₹15,000 - x. Interest from the first part = (x × 10 × 2) / 100 = 0.2x. Interest from the second part = ((15,000 - x) × 15 × 2) / 100 = 0.3(15,000 - x). Total interest = ₹3,500, so 0.2x + 0.3(15,000 - x) = 3,500 0.2x + 4,500 - 0.3x = 3,500 -0.1x + 4,500 = 3,500 -0.1x = -1,000 x = ₹10,000. Correct option: d
138, 140, 152, 174, ?, 248
9 28 83 250 ? 2248
What will come in place of (?) question mark in the given number series.
16, 24, 51, 115, 240, ?
14, 15, 24, 49, 98, 179, ?
What value should come in the place of (?) in the following number series?
71, 72, 76, 103, ?, 24424 12 18 ? 157.5 708.75 3,898.125
Which of the following number will replace the question mark (?) and complete the given number series?
4, 5, 12, 39, 160, ?
71, 79, 88, 152, ?, 393
43 86 258 ? 5160 30960
...188 178 158 ? 88 38
