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प्रश्न
4 defective pens are accidentally mixed with 16 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is drawn at random from the lot. What is the probability that the pen is defective?
बेरीज
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उत्तर
Total number of pens = 4 + 16 = 20
Total possible outcomes = 20
Number of defective pens = 4
P(defective pen) = `4/20 = 1/5`
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या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
