Out of 840 discs tested, 38 are defective. Estimate the number of defective discs in a batch of 43,000. about 3,890 discs about 195 discs about 1,945 discs about 19,450 discs

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asked Nov 23, 2018 117k views

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Out of 840 discs tested, 38 are defective. Estimate the number of defective discs in a batch of 43,000.

about 3,890 discs

about 195 discs

about 1,945 discs

about 19,450 discs

Mathematics
high-school

Vadimtrifonov asked

by Vadimtrifonov

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by proportion 38 / 840 = x / 43000

x = 38*43,000 / 840 = 1,945 answer

Reza Ameri answered Nov 27, 2018

by Reza Ameri

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