<PRE><B>Question 542354</B>
&lt;br&gt;&lt;font face=&quot;Tahoma&quot;&gt;You can set up a proportion to solve this problem:&lt;br&gt;

18 is to 200 as x is to 22000?&lt;br&gt;

{{{18/200=x/22000}}}&lt;br&gt;

Then cross multiply to solve:&lt;br&gt;

{{{22000*18=200*x}}}&lt;br&gt;

{{{396000=200x}}}&lt;br&gt;

{{{x=1980}}}&lt;br&gt;

So we would &quot;expect&quot; to find 1980 defective lightbulbs in a lot of 22000 bulbs.&lt;br&gt;

If this type of problem interests you,&lt;br&gt;

there is a whole field of study about this type of situation called Statistical Quality Control.&lt;br&gt;

I hope this helps!&lt;br&gt;</PRE>