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3 years ago

Karyn proofreads 15 pages in 2 hours for $40.

2 answers:

8 0

Hi there.

Since she reads 15 pages in 2 hours, all we have to do to find out how much she reads in 1 hour is divide.

15/2 = 7.5

7.5 pages/hour

Same applies to the pay

40/2 = 20

$20/hour

Karyn proofreading rate is 7.5 pages per hour. Karyn receives on average $20 per hour.

~

svetlana [45]3 years ago

7 0

15/2 is her rate per hour... she proofreads 7 and a half pages in 1 hour and for 20 dollars

20 / 7.5 is how much does she make per page or 40/15
she makes roughly $ 2 .66

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In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

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