The least number of complete years in which a sum of money put out at 20% compo

Question

The least number of complete years in which a sum of money put out at 20% compound interest will be more than doubled is:

Options:

A . 3

B . 4

C . 5

D . 6

Answer: Option B

P 1 + 20 n > 2P 6 n > 2. 100 5

Now, 6 x 6 x 6 x 6 > 2. 5 5 5 5

So, n = 4 years.

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