The average marks of a class of 30 students is 40 and that of another class of 50 students is 60. Find the average marks of all the students?

The average marks of a class of 30 students is 40 and that of another

1.	The average marks of a class of 30 students is 40 and that of another class of 50 students is 60. Find the average marks of all the students?
A.	50
B.	47.5
C.	59
D.	52.5
Answer» E.

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The average marks of a class of 30 students is 40 and that of another class of 50 students is 60. Find the average marks of all the students?

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