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单选题
In a certain flower shop, only 3 vases of flowers and 1 wreath can be displayed, in this order, at one time. If there are 10 vases of flowers and 4 wreaths to choose from, how many different arrangements of vases and wreaths are possible?
A
17
B
34
C
120
D
2,880
E
4,000
参考答案
参考解析
解析：
根据题干，共有4个位置。有10种选择把花放在第一个位置上，9种选择把花放在第二个位置上，8种选择将花放在第三个位置上，4种选择放在花圈的位置上。所以共有10×9×8×4＝2,880中选择。
根据题干，共有4个位置。有10种选择把花放在第一个位置上，9种选择把花放在第二个位置上，8种选择将花放在第三个位置上，4种选择放在花圈的位置上。所以共有10×9×8×4＝2,880中选择。
更多 “单选题In a certain flower shop, only 3 vases of flowers and 1 wreath can be displayed, in this order, at one time. If there are 10 vases of flowers and 4 wreaths to choose from, how many different arrangements of vases and wreaths are possible?A 17B 34C 120D 2,880E 4,000” 相关考题
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共用题干
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考题
共用题干
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考题
共用题干
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考题
共用题干
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考题
单选题What do you know about “carnation”?A
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考题
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improvesB
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