A sum of Rs.4400 is invested at a compound interest for three years, the rate of interest being 10% p.a., 20% p.a. and 25% p.a. for the 1st, 2nd and the 3rd years respectively. Find the interest received at the end of the three years.  Choose the correct answer:  A) Rs.2860  B) Rs.3120  C) Rs.3320  D) Rs.2760  E) None of these
Let A be the amount received at the end of the three years.   Rs.2860 = 4400[1 + 10/100][1 + 20/100][1 + 25/100]   Rs.2860 = (4400 * 11 * 6 * 5)/(10 * 5 * 4)   Rs.2860 = Rs.7260   So the interest = 7260 - 4400 = Rs.2860   Rs.2860NSWER:Rs.2860
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A sum of Rs.4400 is invested at a compound interest for three years, the rate of interest being 10% p.a., 20% p.a. and 25% p.a. for the 1st, 2nd and the 3rd years respectively. Find the interest received at the end of the three years.