To find aggregate crushing value,

%ACV= $\frac{ Weight of agg.passing through 2.36mm IS sieve}{Weight of oven dried aggregate}$ X 100

For observation I:

%ACV= $\frac{575}{3119}$ X 100 = 18.43%

For observation II:

%ACV= $\frac{581}{3246}$ X 100 =17.89%

For observation III:

%ACV= $\frac{598}{3184}$ X 100 =18.78%

To find average crushing value of given aggregate

Average %ACV = $\frac{ (18.43+17.89+18.78)}{/3}$ X 100

Average %ACV = 18.36%

Suitability: As the % ACV is 18.36%,which is less than 30%, hence the given sample of aggregate is suitable for non-wearing surfaces like roadways, runways etc.