The coefficient of fluctuation of speed is the Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â of maximum fluctuation of speed and the mean speed.

The coefficient of fluctuation of speed is the Â Â Â Â Â Â

1.	The coefficient of fluctuation of speed is the Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â of maximum fluctuation of speed and the mean speed.
A.	product
B.	ratio
C.	sum
D.	difference
Answer» C. sum