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### Discussion :: Simple Interest

1. .What is the principal sum?

I.The sum amounts to Rs. 690 in 3 years at S.I.

II.The sum amounts to Rs. 750 in 5 years at S.I.

III.The rate of interest is 5% p.a.

2. A.
 I and III only
B.
 II and III only
C.

I and II only

D.

I and III only, or II and III only

E.
 Any two of the three