Two classes M and N have average marks 25 and 40 respectively. The overall average obtained is 30. The ratio of the students in the class M and N is:

Two classes M and N have average marks 25 and 40 respectively. The ove

1.	Two classes M and N have average marks 25 and 40 respectively. The overall average obtained is 30. The ratio of the students in the class M and N is:
A.	2 : 1
B.	5 : 6
C.	5 : 3
D.	1 : 2
Answer» B. 5 : 6