Find the mean of the first 10 even natural numbers.

Mean refers to the average of a collection of values and it is given by: 

Mean =$\frac{\mathrm{Sum} \mathrm{of} \mathrm{the} \mathrm{observations}}{\mathrm{Number} \mathrm{of} \mathrm{the} \mathrm{observations}}$

The first 10 even natural numbers are 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20. 

$\Rightarrow$ Mean= $\frac{2+4+6+8+10+12+14+16+18+20}{10}=\frac{110}{10}=11$

Therefore, '11' is the correct response.