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歡迎您訪問數(shù)學(xué)考題練習(xí):如圖,小紅去同學(xué)家,但路況已大變,記不清前面哪!

數(shù)學(xué)考題練習(xí):如圖,小紅去同學(xué)家,但路況已大變,記不清前面哪

更新時(shí)間:2024-01-12 14:00:53作者:貝語網(wǎng)校

如圖,小紅去同學(xué)家,但路況已大變,記不清前面哪條路通往同學(xué)家,那么她能一次選對(duì)路的概率是

A.

B.

C.

D.

試題答案

B

試題解析

讓1除以路的總條數(shù)即為能一次選對(duì)應(yīng)走的路的概率.

解答:因?yàn)橛?個(gè)路線,其中只有1個(gè)是對(duì)的,所以小紅能一次選對(duì)應(yīng)走的路的概率是.

故選B.

點(diǎn)評(píng):考查了概率公式,用到的知識(shí)點(diǎn)為:概率=所求情況數(shù)與總情況數(shù)之比.

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