An enterprising businessman earns an income of Re 1 on the first day of his business. On every subsequent day, he earns an income which is just double of that made on the previous day. On the 20th day of business, he earns an income of:\nOptions:\n(A) Rs 219\n(B) Rs 220\n(C) Rs 20²\n(D) Rs 20\n(E) Rs 30 Stream of consciousness:
User
2nd day he earns = 2 = 2(2 – 1)\n3rd day he earns = 2(3 – 1)\nOn 20th day he earns 2(20 -1) = 219 rupees
Thus, the answer is (A).
Assistant