There are three groups G1, G2 and G3 in a College with 20, 40 and 60 students respectively. The average marks obtained by groups G1, G2 and G3 are 50%, 60% and 70% respectively. Find the average marks (approx) of the entire college.

There are three groups G1, G2 and G3 in a College with 20, 40 and 60

1.	There are three groups G1, G2 and G3 in a College with 20, 40 and 60 students respectively. The average marks obtained by groups G1, G2 and G3 are 50%, 60% and 70% respectively. Find the average marks (approx) of the entire college.
A.	60%
B.	63%
C.	62%
D.	61%
Answer» C. 62%