The average of 12 numbers is 15 and the average of the first two is 14. What is the average of the rest?

Answer: Option B

Average of 12 numbers = 15
Total of 12 numbers = 15 × 12 = 180
Average of first two number = 14
Total of first two number = 14 × 2 = 28
Total of remaining ten numbers = 180 - 28 = 152
Required average of remaining ten number
$$\begin{array}{rl}& =\frac{152}{10}\\ & =\frac{76}{5}\\ & =15\frac{1}{5}\end{array}$$