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## #1 2009-07-26 06:28:01

finitehelp
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### probability problem need help fast!!!

1.A bag contains 7 apples and 5 oranges. If you select 6 pieces of fruit without looking, how many ways can you get 6 apples?

2.How many different three-digit numbers can be written using digits from the set {5, 6, 7, 8, 9} without any repeating digits?

3.A child rolls a 6-sided die 6 times. What is the probability of the child rolling exactly two fours?

## #2 2009-07-26 06:39:02

bobbym

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### Re: probability problem need help fast!!!

Hi finitehelp;

2)

3) If you mean exactly 2 fours and four others you have a simple binomial with 2 successes

Last edited by bobbym (2009-07-28 15:42:33)

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #3 2009-07-26 06:58:51

soroban
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### Re: probability problem need help fast!!!

1. A bag contains 7 apples and 5 oranges.
If you select 6 pieces of fruit without looking, how many ways can you get 6 apples?

finitehelp
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thanks guys!