Question 22696
Probability of a defective bulb = {{{(Number Defective)/(Total Tested)}}}


The ratio of defective bulbs to the number of bulbs tested would be the fraction 
{{{6/200}}}={{{3/100}}}= 3% 


Out of 10280 bulbs, you would expect that approximately 
{{{.03*10280=308.4}}} or about 308 or 309 bulbs will be defective.


R^2 at SCC