The average age of students of a class is years. The average age of boys in the class is years and that of the girls is years. The ration of the number of boys to the number of girls in the class is:
A.
B.
C.
D.
Answer:B
The average age of students of a class is years. The average age of boys in the class is years and that of the girls is years. The ration of the number of boys to the number of girls in the class is:
A. B. C. D.