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#1 2009-07-25 08:28:01

finitehelp
Member
Registered: 2009-06-21
Posts: 76

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?

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#2 2009-07-25 08:39:02

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 90,758

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 (2009-07-27 17:42:33)


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#3 2009-07-25 08:58:51

soroban
Member
Registered: 2007-03-09
Posts: 452

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?

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#4 2009-07-25 09:04:41

finitehelp
Member
Registered: 2009-06-21
Posts: 76

Re: probability problem need help fast!!!

thanks guys!

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