<PRE><B>Question 198959</B>
It is asserted that 80 percent of the cars approaching an individual toll booth in New Jersey are equipped with an EZ Pass transponder. Find the probability that in a sample of six cars:
---------------
Since every car either has or does not have an EZ Pass, the problem 
is binomial.
---------------

a) all six will have the transponder
Ans: (0.8)^6 = 0.262
----------------------------------
b) at least three will have the transponder
Ans: 1 - binomcdf(6, 0.8, 2) = 0.983..
----------------------------------
c) none will have a transponder.
Ans: 0.2^6 = 0.000064
==================================
Cheers,
Stan H. 
</PRE>