Sidhu wants to join a college and finds the rating of 9 out of 10 for campus placements and 8 out of 10 for teaching. Based on his requirement Sidhu gives 55% weightage to campus placements, and 45% weightage to teaching. The final rating of the college out of 10 is:

A

8.55

B

9.15

C

7.45

D

8.15