Question

Three out of 200 machine parts were found to be defective.

About how many parts would be expected to be defective out of 2500 parts

Answer 1

what percentage of 200 is three?

Answer 2

3/200

Answer 3

I think that a proportion can work.
\[\frac{ 3 }{ 200 } = \frac{ x }{ 2500 }\]

Answer 4

Ok so you would take that percentage and multiply it by 2500 and get 37.5 round up to 38

Answer 5

We have the sample proportion as:
\[\frac{ defective }{ total }\]

Answer 6

Now what you just need to do is solve for x.

Answer 7

@Directrix