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sophapowsofie sophapowsofie
  • 11-06-2015
  • Mathematics
Answered

Determine the number of combinations of 7 things taken 4 at a time

Verified Answer :

iloveonedirection
iloveonedirection iloveonedirection
  • 15-06-2015

\(_{7} C_{4} \\ \\ \frac{7!}{(7-4)!4!} \\ \\ \frac{7!}{3!4!} \\ \\ \frac{7*6*5*4*3*2*1}{3*2*1*4*3*2*1} \\ \\ \frac{7*6*5}{3*2*1} \\ \\ \frac{210}{6} \\ \\ 35\)

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