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By Wiki Compound Interest Mathematics Mcqs No Comments

The least number of complete years in which a sum of money put out at 20% C.I. will be more than doubled is_________?

A. 3
B. 4
C. 5
D. 6

Explanation:

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P(1 + 20/100)ⁿ > 2P or (6/5)ⁿ > 2

Now, (6/5 * 6/5 * 6/5 * 6/5) > 2. So, n = 4 years.

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