The average of five consecutive average number is 61. What is the difference between the highest and lowest number?
A
2
B
5
C
8
D
None of these
Correct Answer: 8
Let, number be x, x + 2, x + 4, x + 6, and x + 8 Then ( x + x + 2 + x + 4 + x + 6 + x + 8)5 = 61 5x + 20 = 305 x = 57