Question

find the mean of first for whole number and prime numbers

Answer 1

$$\begin{gathered} \mathrm{The}\mathrm{first}4\mathrm{whole}\mathrm{numbers}\mathrm{are}: \\ 0,1,2,3 \\ \mathrm{Mean}\mathrm{of}\mathrm{observations}=\frac{\mathrm{sum}\mathrm{of}\mathrm{observations}}{\mathrm{number}\mathrm{of}\mathrm{observations}}=\frac{0+1+2+3}{4}=\frac{6}{4}=\frac{3}{2}=1.5 \\ \mathrm{The}\mathrm{first}4\mathrm{prime}\mathrm{numbers}\mathrm{are}: \\ 2,3,5\mathrm{and}7 \\ \mathrm{Now},\mathrm{mean}=\frac{2+3+5+7}{4}=\frac{17}{4}=4.25 \end{gathered}$$