bewellplus.gsu.edu
th0e5ssepinezPop th0e5ssepinezPop
  • 26-11-2016
  • Mathematics
Answered

What is the value of 10C7?


A.12

B.720

C.5040

D.604,800

Verified Answer :

JcAlmighty
JcAlmighty JcAlmighty
  • 28-11-2016

The answer is 120

For combinations we use:
nCr = n!/(r!(n-r)!)
10C7 = ?
n = 10
r = 7

10C7 = 10!/(7!(10-7)!)
         = (10987654321)/(76543213!)
         = 3628800/(5040 32*1) 
         = 3628800/30240
         = 120

Answer Link

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