Given average set of income of 8 people

= 152, 635, 121, 423, 632, 744, 365, 253,

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 averages(S)

=152+635+121+423+632+744+365+253

= 3325

Total number of values(N)= 8

Substituting these values we get (A),

 $= \frac{3325}{8}=415.6$

Hence, Option D is correct.