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Question 1:
The least number of complete years in which a sum of money put out at 20% compound interest will be more than doubled is
A. 2 years
B. 3 years
C. 5 years
D. 4 years
Feedback As per question we need something like following
(1+R/100)^2 >2P
(1+20/100)^n>2
(6/5)^n>2
6/5×6/5×6/5×6/5>2
So answer is 4 years

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