**Question**

**The sum of the ages of 3 people A, B, and C is 90 years. What would be the total of their ages 4 years back?**

A. 75 years

B. 83 years

C. 84 years

D. 78 years

**Answer:** D

**Solution:**

Required sum

= (90 – 3 x 4) years

= (90 – 12) years

= 78 years