The average age of a person and his son at present is 20 years. The ratio of their present ages is 7 : 1. What is the age of son?
Show answer & explanation
Correct answer: A
Explanation
Average Age = 20 years
Total Age =
20 × 2 = 40
Ratio = 7 : 1
Let the Man's Age = 7x
Son's Age = x
Total Age:
7x + x = 8x = 40
x = 5
Son's Age:
x = 5 years
Final Answer = (A) 5 years