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OpenStudy (anonymous):
Use Pascal’s triangle to find the number of ways to choose 2 pens from 5 pens.
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OpenStudy (anonymous):
we can compute but if you are supposed to use pascal's triangle here is a picture http://www.wolframalpha.com/input/?i=pascal%27s+triangle
OpenStudy (anonymous):
go down to the row that starts 1, 5 the next number in that row is 10, and that is your answer
OpenStudy (anonymous):
Thank you so much ((:
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