Probabilty Help -- been workin on it for 8 hours...

[robocop]

first off, thank you to all of you in advance...

im working on a math problem, and i cant seem to come anywhere close at all...

here's the problem:

In a box of crayons there are 6 reds, 3 yellows and 5 blues.  Three crayons are taken randomly from the box.

1) find the probability that at least 1 is red.

2) find the probabilty that all three are the same color.

3)  find the probablility that exactly 2 are blue.

can anyone help me find some dencent conclusions to this?

thank you!

 

[Gene]

You don't say if you are into combinations or not so going back to basics
The probability that there are NO reds is
8/14*7/13*6/12
1 minus that is your answer

The probability that all three are red is
6/14*5/13*4/12

The probability that all three are yellow is
3/14*2/13*1/12

The probability that all three are blue is
5/14*4/13*3/12

The sum of those is your answer

The probality that two are blue and one is not is
5/14*4/13*9/12
but that can be bbn, bnb nbb so it can happen three ways so therr times that is your answer.