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CBSE Notes 2011-2012

In a class of 25 students with ro ll numbers 1 to 25, a student is picked up at random to answer a q...

Short answer question

In a class of 25 students with ro ll numbers 1 to 25, a student is picked up at random to answer a question. Find the probability that the rol 1 number of the selected student is either a multiple of 5 or 7.

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