亚洲男人天堂av,国产一区二区久久精品,国产精品一区二区久久精品,国产精品久久久久久一区二区三区,五月婷婷在线观看视频,亚洲狠狠色丁香婷婷综合

歡迎您訪問數學考題練習:某彩票中獎的概率是1%,下列說法正確的是!

數學考題練習:某彩票中獎的概率是1%,下列說法正確的是

更新時間:2024-01-12 14:11:04作者:貝語網校

某彩票中獎的概率是1%,下列說法正確的是

A.買1張一定不會中獎

B.買100張一定有一張中獎

C.買100張不一定中獎

D.買99張沒中獎,買第100張彩票中獎概率不是1%,而是100%.

試題答案

C

試題解析

概率是反映事件發(fā)生機會的大小的概念,只是表示發(fā)生的機會的大小,是否中獎是隨機事件.

解答:A、中獎的概率是1%,買1張也有可能中獎,故本選項錯誤;

B、根據常識,彩票總數目遠大于100張,所以買100張也不一定中獎,故本選項錯誤;

C、根據常識,彩票總數目遠大于100張,所以買100張也不一定中獎,故本選項正確;

D、買任何1張彩票的中獎率都是1%,都具有偶然性,可能中獎,也可能不中獎,故本選項錯誤.

故選C.

點評:本題考查了概率的意義,概率是反映事件發(fā)生機會的大小的概念,只是表示發(fā)生的機會的大小,機會大也不一定發(fā)生,機會小也有可能發(fā)生.

主站蜘蛛池模板: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |