A hotel has two different ice machines that fill buckets of ice independently of each other. Let A represent the amount of ice i
n a bucket filled by machine A, and let B represent the amount of ice in a bucket filled by machine B. Which of the following choices explains the meaning of independent random variables in context?
The 1st, 4th, and 7th terms make an arithmetic sequence of their own. The 4th term is the average of the 1st and 7th, so ... (1st +7th)/2 = 4th 1st + 7th = 2×4th 1st = 2×4th - 7th