Mathematics, 12.08.2020 05:01 damaricoleman42
There are several sets of different numbers which can be chosen from {0,1,2,3,4,5,6,7,8,9}. c How many of these sets contain any 4 numbers?
Answers: 1
![=\dfrac{10!}{4!6!}\ \ \ \ \ [^nC_r=\dfrac{n!}{r!(n-r)!}]\\\\=\dfrac{10\times9\times8\times7\times6!}{4\times3\times2\times1 \times6!}\\\\=210](/tpl/images/0718/7470/6f054.png)
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There are several sets of different numbers which can be chosen from {0,1,2,3,4,5,6,7,8,9}. c How ma...
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