一道GMAT數(shù)學(xué)DS題
一道GMAT數(shù)學(xué)DS題
Each of the 25 balls in a certain box is either red, blue or white and has a number from 1 to 10 painted on it. If one ball is to be selected at random from the box, what is the probability that the ball selected will either be white or have an even number painted on it?
1)\x09The probability that the ball will both be white and have an even number painted on it is 0.
2)\x09The probability that the ball will be white minus the probability that the ball will have an even number painted on it is 0.2.
求知問(wèn)題翻譯跟答案解析.
Each of the 25 balls in a certain box is either red, blue or white and has a number from 1 to 10 painted on it. If one ball is to be selected at random from the box, what is the probability that the ball selected will either be white or have an even number painted on it?
1)\x09The probability that the ball will both be white and have an even number painted on it is 0.
2)\x09The probability that the ball will be white minus the probability that the ball will have an even number painted on it is 0.2.
求知問(wèn)題翻譯跟答案解析.
英語(yǔ)人氣：966 ℃時(shí)間：2020-06-21 10:30:21
優(yōu)質(zhì)解答
樓下沒(méi)答案啊這道題選E,這道題題目是問(wèn)你P(A+B) = P(A) + P(B) - P(AB)1P(AB)=0是不充分的.因?yàn)槿绻瑫r(shí)發(fā)生的概率為0那么說(shuō)明白球上都不是偶數(shù),但是不代表不是偶數(shù)的都是白球.所以不充分所以鎖定選項(xiàng)B/C/E2白球的概...
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