2014 · Q118
In a family, the age of father, mother, son and grandson are A, B, C and D, respectively. Given that, A - B = 3, B + C = 78, C + D = 33 and the average age of the family as 34 yr, then B - C is
general-mental-abilityquantitative-aptitude
- A19
- B20
- C21
- D22
Explanation
A+B+C+D = 136 with the given equations gives A = 53, B = 50, C = 28, D = 5, so B - C = 22.