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OpenStudy (anonymous):
Evaluate 6C3. 18 20 60 120
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OpenStudy (anonymous):
my guess and calculatiions are 20?
Nnesha (nnesha):
\[\huge\rm nC_r=\frac{ n! }{ r!(n-r)! }\]
Nnesha (nnesha):
n_C_r ;-^
OpenStudy (anonymous):
20..?
OpenStudy (ali2x2):
6C3 = (6!)/((3!)((6-3)!))
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Nnesha (nnesha):
yes ur answer is correct
OpenStudy (ali2x2):
:3
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