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monica10
 4 years ago
9. From a shipment of 400 lightbulbs, a sample of 80 was selected at random and tested. If 32 lightbulbs in the sample were found to be defective, how many defective lightbulbs would be expected in the entire shipment?
A 200
B 128
C 160
D 192
monica10
 4 years ago
9. From a shipment of 400 lightbulbs, a sample of 80 was selected at random and tested. If 32 lightbulbs in the sample were found to be defective, how many defective lightbulbs would be expected in the entire shipment? A 200 B 128 C 160 D 192

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meverett04
 4 years ago
Best ResponseYou've already chosen the best response.4Proportion dw:1327414049485:dw cross multiply 80x = 12800 divide by 80 x = 160 which is C
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