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 10 th day of business, he earns an income of:  Choose the correct choice:	A) 21	B) 22	C) 20	D) 45	E) 30
<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">50 - 5</gadget>
<output>45</output>

<result>D</result>
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 10 th day of business, he earns an income of:
subtract(multiply(5, 10), 5)
2 nd day he earns = 3 ( 2 – 5 ) 3 rd day he earns = 3 ( 3 – 5 ) on 20 th day he earns 3 ( 20 - 5 ) = 45 rupees answer : d