24.A certain office supply store stocks 2 sizes of self-stick notepads, each in 4 colors:
blue, green, yellow, or pink. The store packs the notepads in packages that contain either
3 notepads in package that contain either 3 notepads of the same size and the same color
or 3 notepads of the same size and of 3 different colors. If the order in whick the colors
are packed is not considered, how many different packages of the types described above are
possible?
A.6
B.8
C.16
D.24
E.32
Ans:C
我怎麼算都是C(2,1)*C(4,3)=8,
請問我是那裡的思考有問題嗎?
謝謝。