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PLEASE EXPLAIN PROBABILITY WITH AN WITHOUT REPLACENT!!!

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by TM » Sat Oct 10, 2009 11:52 pm
Want to clear this question:

Jar contains 3 green, 2 red and 3 blue balls. If we randomly pick 5 balls WITH replacement. What is the probability that of the 5 drawn balls picked 1 would be red, 2 green, and 2 blue balls?

My approach:
(5!/2!*2!)*(2/8*3/8*3/8*3/8*3/8)

AND:

Jar contains 3 green, 2 red and 3 blue balls. If we randomly pick 5 balls WITHOUT replacement. What is the probability that of the 5 drawn balls picked 1 would be red, 2 green, and 2 blue balls?

My approach:
(5!/2!*2!)*(2/8*3/7*2/6*3/5*2/4)

Is this correct?
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Source: — Problem Solving |

by vaibhav.iit2002 » Sun Oct 11, 2009 9:03 am
Approach seems right, but need some more inputs as m not comfortable with Prob. :(
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