(1)P1=[C(5,3)+C(4,3)+C(3,3)]/C(12,3)
=[10+4+1]/220
=15/220
=3/44
(2)P2=[C(5,1)×C(4,1)×C(3,1)]/C(12,3)
=[5×4×3]/220
=60/220
=3/11
(1)P1=[C(5,3)+C(4,3)+C(3,3)]/C(12,3)
=[10+4+1]/220
=15/220
=3/44
(2)P2=[C(5,1)×C(4,1)×C(3,1)]/C(12,3)
=[5×4×3]/220
=60/220
=3/11