*해설

<문제 해설>
PPM : pages per minute
분당 인쇄할수 있는 페이지 ex> 8PPM -> 1분에 8장 인쇄

A PPM rating on a printer gives you the speed at which a particular printer can print a page of text in black ink. It does not tell you how quickly the printer can print a page of text and graphics. If the rating on the box says "8 PPM," it means the printer can print eight pages of text per minute. You will often see a separate rating for color printer PPM. It is generally a little slower than the black ink rating