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Mathematics 9 Online
OpenStudy (anonymous):

Back to the cards! In poker, a flush is when all five cards are the same suit. Find the probability of being dealt a flush (when being dealt five cards). Start by just considering clubs. The probability of being dealt all five clubs is the product of the above probabilities. Why is this true and what is this probability? g) You have now found the probability of being dealt a flush in clubs. This is the same as the probability of being dealt a flush in diamonds, hearts, or spades. Then, what is the proability of being dealt a flush?

OpenStudy (anonymous):

wow really stepped up the game for this one, didn't they?

OpenStudy (anonymous):

yup(:

OpenStudy (anonymous):

there are 13 clubs, and you want to be dealt five of them the number of ways to choose 5 out of 13 is \(_{13}C_5\) and the number of ways to choose 5 out of 52 is \(_{52}C_5\)

OpenStudy (anonymous):

so one way to calculate this is \[\frac{_{13}C_5}{_{52}C_5}\]

OpenStudy (anonymous):

use a calculator

OpenStudy (anonymous):

i am not sure what this "The probability of being dealt all five clubs is the product of the above probabilities" means exactly, since i am not reading your book

OpenStudy (anonymous):

here is the whole question, I figured out all of them except the last two. Back to the cards! In poker, a flush is when all five cards are the same suit. Find the probability of being dealt a flush (when being dealt five cards). Start by just considering clubs. a) What is the probability that the first card dealt is a club? b) What is the probability that the second card dealt is a club given that the first one was a club? c) What is the probability that the third card dealt is a club given that the first two were clubs? d) What is the probability that the fourth card dealt is a club given that the first three were clubs? e) What is the probability that the fifth card dealt is a club given that the first four were clubs? f) The probability of being dealt all five clubs is the product of the above probabilities. Why is this true and what is this probability? g) You have now found the probability of being dealt a flush in clubs. This is the same as the probability of being dealt a flush in diamonds, hearts, or spades. Then, what is the proability of being dealt a flush?

OpenStudy (anonymous):

here is the answer for the first one http://www.wolframalpha.com/input/?i=%2813+choose+5%29%2F%2852+choose+5%29

OpenStudy (anonymous):

oh ok

OpenStudy (anonymous):

you can do it this way too do you have to answer each of these in turn?

OpenStudy (anonymous):

in turn?

OpenStudy (anonymous):

I've answer al of them except f and g

OpenStudy (anonymous):

oh ok

OpenStudy (anonymous):

so the product is what you get when you multiply them all together if you did it correctly, the product should be \(\frac{33}{66640}\)

OpenStudy (anonymous):

for the last one g, multiply that answer by 4 since there are four suits

OpenStudy (anonymous):

.0000495?

OpenStudy (anonymous):

if you like decimals, yes

OpenStudy (anonymous):

that is right for f for g, multiply by 4

OpenStudy (anonymous):

okay and then I got .002

OpenStudy (anonymous):

roughly

OpenStudy (anonymous):

roughly

OpenStudy (anonymous):

okay. thanks so much

OpenStudy (anonymous):

on to functions!

OpenStudy (anonymous):

45 minutes for functions

OpenStudy (anonymous):

I know, and there is 10 assignment including a test ot two. danggg it

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