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A cell phone company tests 110 cell phones and finds that 4 of them have defects. Out of 550 cell phones, how many would you expect to have defects?

Guest May 18, 2018
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4/110=?/550

550/110=5

5*4=20

?=20

 

smileysmileysmiley

qualitystreet  May 18, 2018

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