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OpenStudy (anonymous):
A sample of 124 firecrackers contained 9 duds. How many duds would you expect in a sample of 1,240 firecrackers?
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OpenStudy (anonymous):
90
OpenStudy (anonymous):
90. 9/124 > multiply 1240 by the number. also, 1240 = 124(10) so you could also multiply 9 by ten.
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