<PRE><B>Question 344440</B>
If 4 factories in a group of 20 factories in a community are violatig environmental regulations and 6 are randomly selected for inspection, what is the probability that none of the violators will be selected? 
-------------
The probability a randomly selected factory is not
a violator is 16/20 = 4/5
-----
The probability 6 of 6 are not violators is (4/5)^6 = 0.2621
----------------
Cheers,
Stan H.
==============</PRE>