Question 1130064
C( 15,3 ) = {{{ 15! / ( 3! * ( 15 - 3 )! ) }}}
{{{ 15! / ( 3! * 12! ) }}}
{{{ ( 15*14*13 ) / ( 3*2*1 ) = 5*7*13 }}}
{{{ ( 15*14*13 ) / ( 3*2*1 ) = 455 }}} choices
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