A owner of a mart 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 10th day of business, he earns an income of:
Choose the correct choice from the following answers
A) 18 B) 21 C) 22 D) 20 E) 30
2nd day he earns = 2(2 – 1)   3rd day he earns = 2(3 – 1)   On 10th day he earns 2(10 -1) = 18 rupees   18NSWER:18
<result>A</result>
A owner of a mart 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 10th day of business, he earns an income of: