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OpenStudy (anonymous):
Explain what the notation 9P2 means. What is the value of this expression?
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OpenStudy (anonymous):
I believe that's used for permutations (bunch of diff ways to express it). Do you know what permutations are?
OpenStudy (anonymous):
http://dl.uncw.edu/digilib/mathematics/algebra/mat111hb/Izs/inequalities/inequalities.html
OpenStudy (anonymous):
Yes I know what permutations are c: I just don't know what the value of this expression is.
OpenStudy (anonymous):
This says: how many ways can 9 things be arranged in 2 spots? Since this is a permutation, order matters (doesn't matter with combinations).
OpenStudy (amistre64):
9 pick 2 in other words; 9*8
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OpenStudy (amistre64):
9 pick 3 is: 9*8*7
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