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anonymous
 5 years ago
A bag of marbles contains 8 red marbles and 5 green marbles. Three marbles are drawn at random at the same time. Find the probability that all three are red.
anonymous
 5 years ago
A bag of marbles contains 8 red marbles and 5 green marbles. Three marbles are drawn at random at the same time. Find the probability that all three are red.

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[{{8 \choose 3}\over {13 \choose 3}}\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I assume you're familiar with choose notation.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Well either you, or the original poster. Whomever wants to read/understand my answer.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0it's not 8 out of 13 though. That'd be about 61 percent

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Well yours is eight thirds over thirteen thirds right?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no. it's choose notation. \[{n \choose k} = {n! \over k!(nk)!}\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Ok yepp then i have no clue lol

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0that's ok. it's a fun thing to learn about.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I'd rather stay away from the complicated stuff if you can do it the easy way i choose that.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Basically it boils down to : How many different ways can we pick 3 red marbles from a set of 8 red marbles. Then we divide that by the number of different ways we can choose 3 marbles from a bag of 13 marbles.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0mhm.. I did that in like 4th grade so i really dont remember it lol

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I'm not sure it's the same as what you're remembering.. But in any case there are 56 different ways you can pick 3 red marbles from a set of 8 red marbles.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0And there are 286 ways you can pick any 3 marbles from a bag of 13 marbles.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0so 56/286 = .1958 or 19.6%

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Is the probability you will grab exactly 3 red marbles.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0I get it now, thank you.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0This function is often built into calculators as the C function

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Are you really smart brain wise or calculator wise or just incredibly smart period?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0hrm.. tough one to answer. Probably I have just taken a lot of math classes. ;)
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