What is the principal sum? I. The sum amounts to Rs. 690 in 3 years at S.I.

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Question: 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.

Options are:

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

Correct answer is:

E.     Any two of the three