Question

A Web music store offers two versions of a popular song the size of the standard version is 2.7 MB the size of a high-quality version is 4.1 MB yesterday there were 1130 downloads of the song for a total download size of 3723 MB. How many downloads of the high-quality version where there

Answer 1

480

Explanation:

Let h represent the number of high-quality downloads. Then the total download size is ...

4.1h +2.7(1130-h) = 3723

1.4h = 672 . . . . . . . . . . . . . . subtract 2.7·1130 = 3051

h = 480 . . . . . . . divide by 1.4

There were 480 downloads of the high-quality version.