SOLUTION: a bag contains six blue pencils, three red pencils, and three pencils. If two penciles are selected at random without replacement, what is the probability that both are red?

Algebra.Com
Question 846679: a bag contains six blue pencils, three red pencils, and three pencils. If two penciles are selected at random without replacement, what is the probability that both are red?
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
a bag contains six blue pencils, three red pencils, and three pencils. If two penciles are selected at random without replacement, what is the probability that both are red?
--------------
# of ways to succeed: 3C2 = 3
------
# of random pairs: 12C2 = (12/11)/(1*2) = 66
-----
P(2 red pencils) = 3/66 = 1/22
---------------------------------
Cheers,
Stan H.
======================

RELATED QUESTIONS

A student's pencil case contains six red pencils and eight black pencils. If seven... (answered by Boreal)
A drawer contains exactly 5 red, 4 blue and 3 green pencils. If two pencils are selected... (answered by stanbon)
A drawer contains exactly 5 red, 4 blue and 3 green pencils. If two pencils are selected... (answered by stanbon)
A box contain 6 white, 5 red and 4 black pencils. Fin the probability of getting at least (answered by rothauserc)
4.24. There are two urns containing pens and pencils. Urn #1 contains three pens and... (answered by ikleyn,ggvindy)
A bag contains five red, three white, and two blue balls. If three balls are selected at... (answered by ikleyn)
Ten pencils and eight pens are in a box. Eleven writing utensils are to be selected at... (answered by greenestamps)
A bag contains five red chips, three white chips, and two blue chips. Three chips are to... (answered by ewatrrr)
six pencils and three rubbers cost #234 five pencils and two rubbers cost #184. How much... (answered by josgarithmetic)