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OpenStudy (anonymous):
A sample of 140 firecrackers contained 4 duds. How many duds would you expect in a sample of 2380 firecrackers?
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OpenStudy (anonymous):
let x=duds make a proportion 4/140=x/2380 cross multiple 140x=9520 solve for x 9520/140=x x=68 answer 68 duds
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