Give a quick stream of consciousness before answering the following question. 4000 was divided into two parts such a way that when first part was invested at 3% and the second at 5%, the whole annual interest from both the investments is Rs.144, how much was put at 3%?\nOptions:\n(A) 2800\n(B) 2500\n(C) 2700\n(D) 3000\n(E) 3500
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(x*3*1)/100 + [(4000 - x)*5*1]/100 = 144\n3x/100 + 200 â€“ 5x/100 = 144\n2x/100 = 56 Ã¨ x = 2800
The answer: (A).
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