The average of four consecutive even numbers is 15. The 2nd highest number is :

Answer: Option D

Let the four even consecutive numbers
x, x + 2, x + 4, x + 6
According to the question,
$$\frac{x+x+2+x+4+x+6}{4}=15$$
4x + 12 = 60
4x = 48
x = 12
∴ 2^nd highest number is
= x + 4
= 12 + 4
= 16