Give a quick stream of consciousness before answering the following question. An enterprising businessman earns an income of Re 5 on the first day of his business. On every subsequent day, he earns an income which is just thrice of that made on the previous day. On the 10th day of business, he earns an income of:\nOptions:\n(A) 21\n(B) 22\n(C) 20\n(D) 45\n(E) 30
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2nd day he earns = 3(2 – 5)\n3rd day he earns = 3(3 – 5)\nOn 20th day he earns 3(20 -5) = 45 rupees
The answer: (D).
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