MathematicsMedium75×since 2002Q5007Three rotten apples are accidently mixed with fifteen good apples. Assuming the random variable xxx to be the number of rotten apples in a draw of two apples, the variance of xxx isA57153\frac{57}{153}15357B40153\frac{40}{153}15340C37153\frac{37}{153}15337D47153\frac{47}{153}15347Check answerSkip