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## Homework Statement

Find the Average Grain Diameter

## Homework Equations

d= C/N

_{L}M

## The Attempt at a Solution

My instructor hasn't defined what C or M are. I could easily solve this equation if I just knew which numbers I am supposed to substitute in for C and M. N

_{L}is the average number of intercepted grains determined by a 3, 3.5in line strategy. The number I have for it is 2.8grains/in.

Any clues on to what C and M could stand for?