intersection and union 0 intersection and union 1 / 7 choose a b c 2 / 7 choose a b c d 3 / 7 choose a b c d 4 / 7 choose X Y 5 / 7 choose { 3 } {3 , 5 , 2 } 3 6 / 7 choose { 2 } {4 , 2 } 2 7 / 7 choose { 5 } {6 , 5 } { 5 , 6 , 4 } نتيجتك هي اظهر المزيد