59、A interrior decorator will paint the apartment , there are six colors of the painting the decorator can use:red, blue , green , yellow,white,and pink. how many choices the decorator can make with the white color included ever chice. bigur解答: 说实话,题目真的看不懂什么意思。大体猜测一下,就是6种颜色可以和白色来混合,说有几种结果。那就是从6中颜色中,可以随便0-6种,有多少个取法 1+C(6,1)+C(6,2)+C(6,3)+C(6,4)+C(6,5)+C(6,6)= 64 最后一个单词chice是否应为choice? 我觉得应该五种吧,白色和白色混还有什么意义? 另外我不明白为什么要单独加个1呢?如果按五种来算,是否是c5,1+c5,2+c5,3+c5,4+c5,5? |