<PRE><B>Question 959191</B>
a box contains 6 white 5 red and 4 black balls. find the probability of getting at least two red balls&amp;#885; if 4 balls are drawn from the box
---------
# of ways to succeed:: 5C2*10C2 + 5C3*10C1 + 5C4 = 10*45 + 10*10 + 5 = 555 ways
# of possible groups of 4:: 15C4 = 1365
----
Ans: 555/1365 = 0.4066
----------------
Cheers,
Stan H.
------------- </PRE>