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歡迎您訪問數學考題練習:分別寫有數字0,-1,-2,1,3的五張卡片,!

數學考題練習:分別寫有數字0,-1,-2,1,3的五張卡片,

更新時間:2024-01-12 16:25:24作者:貝語網校

分別寫有數字0,-1,-2,1,3的五張卡片,除數字不同外其他均相同,從中任抽一張,那么抽到負數的概率是

A.

B.

C.

D.

試題答案

B

試題解析

讓是負數的卡片數除以總卡片數即為所求的概率,即可選出.

解答:∵五張卡片分別標有0,-1,-2,1,3五個數,數字為負數的卡片有2張,

∴從中隨機抽取一張卡片數字為負數的概率為.

故選B.

點評:本題考查隨機事件概率的求法:如果一個事件有n種可能,而且這些事件的可能性相同,其中事件A出現m種結果,那么事件A的概率P(A)=.

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