How many defective bulbs will there be?

Question

A quality-control inspector examined 400 light bulbs and found 29 defective.   At this rate, how many defective bulbs would there be in a lot of 44000 bulbs? 

Answer 1

Not sure what "ortoootlt" means, so I've replaced to lot sizes with y and z here.

 

If there are 29 defective light bulbs in y, then how many defective light bulbs will there be in z?

 

Set up the problem as a proportion.  

 

Compare 29 to Y and your unknown quantity to Z.  Or, compare Y to Z and 29 to your unknown quantity.  Either of these formulas get the same result for the unknown "?" - 

 

29 / y = ? / z

 

OR 

 

? / 29 = z / y

 

Hope this helps.