enidsiadarby enidsiadarby
  • 18-09-2017
  • Mathematics
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evaluate 11p4 and 9c5

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jdoe0001 jdoe0001
  • 18-09-2017
[tex]\bf _{n}P_{r}=\cfrac{n!}{(n-r)!}\qquad \qquad _{11}P_4=\cfrac{11!}{(11-4)!} \\\\\\ _nC_r=\cfrac{n!}{r!(n-r)!}\qquad \qquad _9C_5=\cfrac{9!}{5!(9-5)!} [/tex]


check your calculator on the factorial(!) button.
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