KcetProbabilityKCET 2017MCQ+1 / -02017A box has 100 pens of which 10 are defective. The probability that out of a sample of 5 pens drawn one by one with replacement and atmost one is defective, isA $\frac{9}{10}$B $\frac{1}{2}\left(\frac{9}{10}\right)^4$C $\left(\frac{9}{10}\right)^5+\frac{1}{2}\left(\frac{9}{10}\right)^4$D $\frac{1}{2}\left(\frac{9}{10}\right)^5$Check AnswerClear SelectionReveal AnswerShow Explanation
