like combination/choose, nCr is $\displaystyle n \choose r$ what about for permutation, nPr? I can't seem to find the code for it. Thanks!
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Hello, I've went to wikipedia, so excuse me if it doesn't correspond to the writing you know.. $\displaystyle _{n} P_{r}$ : _{n} P_{r} Or sometimes : $\displaystyle P_{r}^{n}$ : P_{r}^{n}
Originally Posted by Moo Hello, I've went to wikipedia, so excuse me if it doesn't correspond to the writing you know.. $\displaystyle _{n} P_{r}$ : _{n} P_{r} Or sometimes : $\displaystyle P_{r}^{n}$ : P_{r}^{n} Yeah I think that Moo is correct...that is what I use to represent permuatation here
For "choose" , I generally use [tex]n \choose r [/tex]. However there is an alternative, which Plato uses:[tex]{\binom{n}{r}} [/tex] which also gives $\displaystyle {\binom{n}{r}} $ Why would they keep 2 symbols for the same representation
Perhaps some people don't know about the probability one but know about the polynomial one ? Or vice-versa ?
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