Math Is Fun Forum

finitehelp

Member

Registered: 2009-06-21

Posts: 80

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?

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

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)

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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?

finitehelp

Member

Registered: 2009-06-21

Posts: 80

Re: probability problem need help fast!!!

thanks guys!