SajjadAhmad wrote:

Of the pages produced by a printing press, 15% are unusable. How many pages must be produced per minute by the printing press to yield 1,020 usable pages in an hour?

A. 17

B. 20

C. 23

D. 24

E. 25.5

If we need 1,020 pages in an hour:

1. 15% of the TOTAL number of pages produced that hour will be defective, so 1,020 = 85% of that total (x)

2. 1,020 = .85x ==>

x = 1200 pages needed total in one hour

3. Convert to per minute:

1200 / 60 (mins in an hour) =

20 pages per minute

Answer B

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