A-Level
AQA
Mathematics (UK)
October 2020
QP-202010-Mathematics-U5-Local · Question 7
Question (excerpt):
7 (a) Using nCr ¼ n! r!(n r)! show that nC2 ¼ n(n 1) 2 [2 marks] _____________________________________________________________________________________ _______________________________________________…
7 (a) Using nCr ¼ n! r!(n r)! show that nC2 ¼ n(n 1) 2 [2 marks] _____________________________________________________________________________________ _______________________________________________…
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