<PRE><B>Question 539633</B>
A certain jar consists of seven green marbles, five black and four red marbles. If three marbles are drawn at random, find the probability that all three marbles are the same color.

----
# of ways to succeed: 7C3 + 5C3 + 4C3 = 35+10+4 = 49
----
# of random sets of 3: 16C3 = 560
--
P(3 same color) = 49/560 = 0.0875
====================================
Cheers,
Stan H.
===============</PRE>