SOLUTION: 2 marbles are selected at random from an urn which contain 4 white and 8 black marbles. what is the probability that both marbles will be white?

Algebra ->  Algebra  -> Probability-and-statistics -> SOLUTION: 2 marbles are selected at random from an urn which contain 4 white and 8 black marbles. what is the probability that both marbles will be white?      Log On

Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

   

Question 473225: 2 marbles are selected at random from an urn which contain 4 white and 8 black marbles. what is the probability that both marbles will be white?
Answer by stanbon(57219) About Me  (Show Source):
You can put this solution on YOUR website!
2 marbles are selected at random from an urn which contain 4 white and 8 black marbles. what is the probability that both marbles will be white?
----
# of ways to select 2 white marbles: 4C2 = 6
---
# of ways to select 2 marbles randomly: 12C2 = 66
----
P(2 white) = 6/66 = 1/11
===============================
Cheers,
Stan H.
==========