Q. 464.8( 5 Votes )
12 defective pens are accidently mixed with 132 good ones. It is not possible to just look at pen and tell whether or not it is defective. One pen is taken out at random from this lit. Determine the probability that the pen taken out is good one.
Answer :
Total number of possible outcomes, n(S) = 144
Number of favorable outcomes, n(E) = 132
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PREVIOUSA lot consists of 144 ball pens of which 20 are defective and others good. Nuri will buy a pen if it is good, but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is the probability that(i) She will buy it?(ii) She will not buy it?NEXTFive cards – the ten, jack, queen, king and ace of diamonds, are well-shuffled with their face downwards. One card is then picked up at random.(i) What is the probability that the card is the queen?(ii) If the queen is drawn and put a side, what is the probability that the second card picked up is (a) an ace? (b) a queen?
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RELATED QUESTIONS :
Which of the following amongst the given options cannot be the probability of an event:
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KC Sinha - Mathematics