If average of x, x+2, x+4 is 10, find x.
Show answer & explanation
Correct answer: B
Explanation
Given:
Numbers = x, x + 2, x + 4
Average = 10
By the formula:
Average = (Sum of numbers) / (Number of numbers)
10 = (x + (x + 2) + (x + 4)) / 3
10 = (3x + 6) / 3
30 = 3x + 6
3x = 24
x = 8