Difference between revisions of "NCR"
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| − | The number of ways of choosing | + | The number of ways of choosing ''r'' objects from ''n'' is written ''n''C''r'', and ''n'' and ''r'' are the letters usually chosen. Joyce uses small caps for N and R though by the first half of the 20th century variables were invariably written in italics. |
Revision as of 10:39, 19 July 2011
The number of ways of choosing r objects from n is written nCr, and n and r are the letters usually chosen. Joyce uses small caps for N and R though by the first half of the 20th century variables were invariably written in italics.
