SOLUTION: a bag contains 10 marbles (4 red, 2 white and 4 blue). if you select 3 marbles at random from the bag without replacement, what is the probability ( as a common fraction) that exac

Question 440511: a bag contains 10 marbles (4 red, 2 white and 4 blue). if you select 3 marbles at random from the bag without replacement, what is the probability ( as a common fraction) that exactly two of the marbles selected will be red?
Plz help me fast this problem is killing me!
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
nCr=Combination of n things taken r at a time
((4C2)(6C1))/10C3 Combination of 4 red balls taken 2 at a time times one of the six other balls, all divided by the combination of 10 balls take 3 at a time.
=(6*6)/120
=36/120
=3/10
.
Ed
RELATED QUESTIONS
A bag contains 10 red marbles, 8 white marbles, and 6 blue marbles. You draw 3 marbles... (answered by ikleyn)

A bag contains 4 blue marbles, 6 green marbles, and 2 red marbles. You select one ball at (answered by rfer)

A bag contains 4 blue marbles and 5 red marbles. If 2 marbles are selected at random... (answered by scott8148)

A bag contains 6 red marbles, 4 blue marbles, 7 white marbles and 9 yellow marbles. You... (answered by edjones)

A bag contains 5 red marbles, 6 blue marbles, 9 white marbles and 9 yellow marbles. You... (answered by )

A bag contains 10 red marbles, 6 white marbles, and 9 blue marbles. You draw 4 marbles... (answered by ikleyn)

A bag contains 8 red marbles, 7 blue marbles, 10 white marbles and 9 yellow marbles. You... (answered by ewatrrr)

A bag contains 10 red, 3 white and 6 blue marbles. Two are selected at random without... (answered by stanbon)