Each signal that a certain ship can make is comprised of 3 different flags hanging vertically in a particular order. How many unique signals can be made by using 4 different flags?
Each signal that a certain ship can make is comprised of 3 different flags hanging vertically in a perticular order.How many unique signals can be made by using 4 different flags?
A 10
B12
c 20
D 24
E 36
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sysadmin
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PS-数学
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sysadmin老师
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题目不明白是什么意思
之前一个录音说到式子为P43,不知道为什么这么列
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不是P43吗?谢谢。
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sysadmin老师
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Each signal that a certain ship can make is comprised of 3 different flags hanging vertically in a perticular order.How many unique signals can be made by using 4 different flags?
A 10
B12
c 20
D 24
E 36