What is the compound interest paid on a sum of Rs.3000 for the period of 3 years at 10% per annum. Choose the correct choice from the following answers
A) 900 B) 930 C) 990 D) 993 E) None of these
Solution= Interest % for 1st year= 10   Interest % for 2nd year= 10+ 10% of 10= 10+ 10 *10/100= 
<gadget id="calculator">10+ 10 *10/100</gadget>
<output>11</output>
11   Interest % for 3rd year= 10+ 10%(10+11)=10+ 2.1= 
<gadget id="calculator">10+ 2.1</gadget>
<output>12.1</output>
12.1   Total % of interest= 10 + 11+12.1= 
<gadget id="calculator">10 + 11+12.1</gadget>
<output>33.1</output>
33.1   Total interest= 33.1 % 3000= 3000 * (33.1/100)= 
<gadget id="calculator">3000 * (33.1/100)</gadget>
<output>993</output>
993   Answer 993
<result>D</result>
What is the compound interest paid on a sum of Rs.3000 for the period of 3 years at 10% per annum.