1.  The difference between the ages of Meena and Seema is 3 yr and the ratio between their ages is 7 : 8. What is the sum of their ages?
A. 43 yr
B. 41 yr
C. 45 yr
D. 48 yr
E. 47 yr

Answer: Option C

Explanation:

Let ages of Meena and Seema are 7x yr
and 8x yr, respectively.

 8x - 7x = 3

x = 3

Hence, required sum = 8x + 7x
                               = 15 x 3 = 45 yr