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### Discussion :: Simple Interest

1.  What is the rate of simple interest?

I. The total interest earned was Rs. 4000.

II. The sum was invested for 4 years.

2. A.

I alone sufficient while II alone not sufficient to answer

B.

II alone sufficient while I alone not sufficient to answer

C.

Either I or II alone sufficient to answer

D.
 Both I and II are not sufficient to answer
E.
 Both I and II are necessary to answer

Explanation :

 We know that, R = $$[\frac { 100*S*I } { P*T } ]$$

we,  I gives, S.I. = Rs. 4000.

II gives, T = 4 years.

But, P is unknown. So, we cannot find R.

So, given data is insufficient to get R.

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