Questions
A bag has 10 balls. Six balls are drawn in an attempt and replaced. Then another draw of 5 balls is made from the bag. The probability that exactly two balls are common to both the draw is
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Correct option is A
The total number of ways of making the second draw is 10C5The number of draws of 5 balls containing 2 balls common with first draw of 6 balls is 6C24C3. Therefore, the probability is 6C24C3 10C5=521Similar Questions
The odd against an event are 5 to 2 and the odds in favour of another disjoint event are 3 to 5. Then the probability that atleast one of the events will happen is
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