Given set of scores= 253, 124, 255, 534, 375, 101, 443, 76

We know the formula,

 $\mathrm{Average} \left(\mathrm{A}\right)=\frac{\mathrm{Sum} \mathrm{of} \mathrm{given} \mathrm{values} \left(\mathrm{S}\right)}{\mathrm{Total} \mathrm{number} \mathrm{of} \mathrm{values} \left(\mathrm{N}\right)}$

 Here,

 Sum of given values(S)

=12.5+11.6+13.2+15.6+9.8

= 62.7

Total number of values(N)= 5

Substituting these values we get (A),

 $= \frac{62.7}{5}=12.54$

Hence, Option A is correct.