1. 

What is the principal sum ?

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

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

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

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

Answer: Option E

Explanation:

Clearly, any two of the three will give us the answer.

Correct answer is (E).