Question

Of the 10,000 clocks from which the sample was chosen, about how many clocks are probably not defective?

Answer 1

The number of clocks that are not defective is an illustration of proportions

Of the 10000 clocks, 9250 are probably not defective

How to determine the number of clocks that are not defective?

From the complete question, we have the following parameter:

15 out of 200 clocks are defective

The above means that the number of clocks that are not defective is:

Not defective = 200 - 15

Not defective = 185

Express as percentage

Not defective = 185/200

Not defective = 92.5%

In 10,000 the number of clocks that are not defective would be:

Not defective = 92.5% * 10000

Not defective = 9250

Hence, 9250 of the 10000 clocks are probably not defective

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