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歡迎您訪問數(shù)學(xué)考題練習(xí):一個均勻的小立方體的6個面上分別標有數(shù)字,任意!

數(shù)學(xué)考題練習(xí):一個均勻的小立方體的6個面上分別標有數(shù)字,任意

更新時間:2024-01-12 16:47:57作者:貝語網(wǎng)校

一個均勻的小立方體的6個面上分別標有數(shù)字,任意擲出這個小立方體,若P(“1”朝上)=,則這個小立方體的6個面上分別標有的數(shù)字可以是

A.1,2,3,4,5,6

B.1,1,3,3,5,5

C.1,2,2,3,6,6

D.1,2,1,3,1,4

試題答案

B

試題解析

通過概率公式求得含有數(shù)字1的個數(shù),再從選項中選擇即可.

解答:由于若P(“1”朝上)=,故1在六個數(shù)中的概率為,所以有6×=2個,只要符合此條件即可.

故選B.

點評:用到的知識點為:具體數(shù)目=相應(yīng)的概率與總情況數(shù)之積.

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