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Mathematics 13 Online
OpenStudy (anonymous):

Please help with question about probability!!

OpenStudy (anonymous):

OpenStudy (amistre64):

given just cotton, there are only 5 colors to pick from, 5 different shirts

OpenStudy (anonymous):

ok

OpenStudy (amistre64):

each color has the same chance of being picked, for now, what is the probability of picking a particular color?

OpenStudy (anonymous):

4/15

OpenStudy (amistre64):

no, how do we determine a basic probability of an event ...

OpenStudy (amistre64):

let me reread this thing to make sure if got the right idea going ...

OpenStudy (amistre64):

well, we know C is out

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

i think its B

OpenStudy (amistre64):

the probability of picking a colored cotton is 5 out of 15, 1/3 but after one picks, there are 4 out of 14 left, then 3 out of 13, etc ... right? does this make sense?

OpenStudy (anonymous):

kinda

OpenStudy (anonymous):

1/5!

OpenStudy (anonymous):

it seems that 1/273 was too high

OpenStudy (amistre64):

5.4.3.2 ---------- 15.14.13.12 multiplied by something, for the permutations

OpenStudy (anonymous):

it is 1/273

OpenStudy (anonymous):

thanks

OpenStudy (amistre64):

there is 1/273 of picking one arrangement, we need to determine how many arrangements there are

OpenStudy (amistre64):

or that could be it ...

OpenStudy (amistre64):

my best educated guess is 1/273, its at least a part of the process if we multiply it by some x value x/273 = 12/65, only if x = 252/5, and thats not an integer x/273 = 1/5, only if x = 273/5, and thats not an integer

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