Question

5% of the watches produced by a factory are defective . In a random check,I pick one in 3 defective watches If I check all the watches made by the factory on a given day and pick 25 defective watches. How many watches are made by the factory on that day​

Answer 1

Answer:

500 watches are made

Step-by-step explanation:

Suppose 5 in 100 are defective that means 1 in 20 are defective.

If 25 watches are defective 1/20=25/x

1×25/20×25=25/x

25/500=25/x

Therefore,x=500

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