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### Discussion :: Simple Interest

1. The simple interest on a sum of money is Rs. 50. What is the sum?

I.The interest rate is 10% p.a.

II. The sum earned simple interest in 10 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 :

Given : S.I. = Rs. 50.

I gives, R = 10% p.a.

II gives, T = 10 years.

 Sum = $$\left(\frac{100 *S.I}{T*R}\right)$$ = Rs. $$(\frac { 100*50 } {10*10 } )$$ = Rs. 50.

Thus, I and II together give the answer.