Question 1126955

a)  C(42,6) = {{{ 42! / (6!*36!) =  (42*41*40*39*38*37)/6!  = highlight( 5245786 ) }}}
b)  {{{ 2/5245786 = highlight( 1/2622893  ) }}}  or approx.  0.000000381, assuming the tickets are not duplicates of course.