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What is the rate of interest p.c.p.a.? I. The amount doubles itself in 5 years on simple interest. II. Difference between the compound interest and the simple interest earned on this amount in two years is $400. III. Simple interest earned per annum is $2000.

Only I
Only II and III
Any two of the three
All I, II and III

Correct Answer:

Explanation:

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