+118723 It is the notation for permutation.
Say you have 7 books. You want to randomly choose 3 of them and the order counts. How many ways can those 3 books be chosen.
Mathematically this is "How many permutations of 3 books can I get from 7 books"
The answer is $$^7P_3$$
you can do this on any scientific calculator. On the web 2 calc on the home page I could enter it as
nPr(7,3) and this is my answer ; 210
$${\left({\frac{{\mathtt{7}}{!}}{({\mathtt{7}}{\mathtt{\,-\,}}{\mathtt{3}}){!}}}\right)} = {\mathtt{210}}$$
+118723 It is the notation for permutation.
Say you have 7 books. You want to randomly choose 3 of them and the order counts. How many ways can those 3 books be chosen.
Mathematically this is "How many permutations of 3 books can I get from 7 books"
The answer is $$^7P_3$$
you can do this on any scientific calculator. On the web 2 calc on the home page I could enter it as
nPr(7,3) and this is my answer ; 210
$${\left({\frac{{\mathtt{7}}{!}}{({\mathtt{7}}{\mathtt{\,-\,}}{\mathtt{3}}){!}}}\right)} = {\mathtt{210}}$$
