If 4 printers can print 1,200 pages in an hour, how many pages can 7 printers print in an hour at the same rate?
Correct answer: D. 2,100
One printer prints 1,200 ÷ 4 = 300 pages an hour, so 7 printers print 7 × 300 = 2,100 pages. This is direct proportion: more printers, more pages.
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