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Mathematics 18 Online
OpenStudy (anonymous):

Medal and fan ! Daeshon is in the Math club. There are 21 students in the club. The Math teacher will pick two students at random to guide visiting students from Colorado. What is the probability that Daeshon will not be picked as a guide? A) 20/21 B) 19/21 C) 2/21 D) 1/20

OpenStudy (anonymous):

what's the probability he will be picked as a guide?

OpenStudy (anonymous):

or, think of it this way... |dw:1406058824869:dw|

OpenStudy (anonymous):

so 2/21 ? @pgpilot326

OpenStudy (anonymous):

nope...

OpenStudy (anonymous):

we have 20 other people to pick first that aren't Daeshon

OpenStudy (anonymous):

and second, we have how many left that aren't Daeshon?

OpenStudy (anonymous):

|dw:1406059354480:dw|

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