The average age of three boys is 15 years. If their ages are in ratio 3:5:7, the age of the youngest boy is:
A. 9 years
B. 18 years
C. 21 years
D. 27 years
Related Questions on Quantitative MCQs paper 1
A. 9 years
B. 18 years
C. 21 years
D. 27 years