Andrea has 6 blue shirts, 2 red shirts, and 5 green shirts in her closet. What is the probability that she will randomly pick out a red shirt on Monday and a green shirt on Tuesday after putting the red shirt in the laundry?
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OpenStudy (anonymous):
Red shirt: 2/13
Green shirt: 5/12
OpenStudy (anonymous):
Do you understand why?
OpenStudy (anonymous):
no
OpenStudy (anonymous):
All together there are how many shirts?
OpenStudy (anonymous):
13
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OpenStudy (anonymous):
so when you're picking a red shirt on Monday there are two of them out of thirteen.
on Tuesday, there is one shirt less because the red shirt is in the wash but there are still 5 green shirts. So the probability becomes 5/12
OpenStudy (anonymous):
Understand?
OpenStudy (anonymous):
2/5?
OpenStudy (anonymous):
What?
OpenStudy (anonymous):
willits be 2/5
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OpenStudy (anonymous):
it^
OpenStudy (anonymous):
How did you get that?
OpenStudy (anonymous):
guessed
OpenStudy (anonymous):
on monday there is a 2/13 chance she will get a red shirt
on tuesday there is a 5/12 chance she will get a green shirt because one red shirt is in the wash!
Get it now?