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歡迎您訪問數學考題練習:下列事件屬于必然事件的是!

數學考題練習:下列事件屬于必然事件的是

更新時間:2024-01-12 16:37:25作者:貝語網校

下列事件屬于必然事件的是

A.擲一次骰子,向上的一面是6點

B.某種草票的中獎率是,購買100張彩票一定中獎

C.367人中至少有兩人的生日相同

D.某射擊運動員射擊一次,命中靶心

試題答案

C

試題解析

根據必然事件的概念(必然事件指在一定條件下一定發生的事件)可判斷正確答案.

解答:A、擲一次骰子,向上的一面是6點,是隨機事件;

B、某種彩票的中獎率為 ,購買100張彩票一定中獎,是隨機事件;

C、一年最多有366天,367人中至少有兩人的生日相同,是必然事件;

D、某射擊運動員射擊一次,命中靶心,是隨機事件.

故選C.

點評:本題主要考查必然事件、不可能事件、隨機事件的概念.必然事件指在一定條件下一定發生的事件;不可能事件是指在一定條件下,一定不發生的事件;不確定事件即隨機事件是指在一定條件下,可能發生也可能不發生的事件.

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