[中學] 排列組合
一、
投擲四顆骰子,共可出現多少種不同的花色??
A:126
二、
設郵局備有7種不同的郵票,今小王前往郵局任意購買3張,則有____種不同的買法
A:84
三、
六種不同口味的冰淇淋,今有3位小朋友同往各買一份,則售貨員有____種取法
A:56
這三題是被列在重複組合的單元裡面 但是我怎麼看都不像是重複組合的題目啊
請給我引導一下 謝謝
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