Re: [計量] PP1的PS
※ 引述《gwuho (JOe)》之銘言：
: A certain office supply store stocks 2 sizes of self-stick notepads,
: each in 4 colors: blue, green, yellow, or pink.
: The stock packs the notepads in packages 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 which the colors are packed is not considered,
: how many different packages of the types described above are possible?
: Ans:16
: 請問思路要怎麼走? thx~
兩種選擇方式
(1)同尺寸同顏色
尺寸2選1 * 顏色4選1 = 2*4 = 8種
(2)同尺寸不同顏色
尺寸2選1 * 顏色4種任選3 = 2 * C4取3 = 8種
加起來16種 #
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