SOLUTION: In a sample of 6000 new iPhones, 48 were found to be defective. At this rate, how many defective iPhones would be expected in a sample of 35,000 iPhones?

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Question 1139097: In a sample of 6000 new iPhones, 48 were found to be defective. At this rate, how many defective iPhones would be expected in a sample of 35,000 iPhones?
Found 2 solutions by rfer, ikleyn:
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
48/6000=x/35000
6000x=1680000
x=1680000/6000
x=280 defective

Answer by ikleyn(52817) About Me  (Show Source):
You can put this solution on YOUR website!
.

See the classic problem of the same type in the lesson
    - Using proportions to estimate the number of fish in a lake
in this site.

When you read this lesson, you will not miss this kind of problems with anything else.