Question

What is the weighted average of three points on a number line at 5, 10, and 25, with a ratio of 1:2:2
?(1 point)
Responses

15
15

11
11

18
18

10

Answer 1

Weighted average = (1·5 + 2·10 + 2·25) / (1+2+2) = (5 + 20 + 50) / 5 = 75/5 = 15.