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प्रश्न
A box contains 30 tickets, bearing only one number from 1 to 30 on each. If one ticket is drawn at random, find the probability of an event that the ticket drawn bears a complete square number.
उत्तर
Total number of tickets = 30
Number of tickets bearing perfect square number = 1, 4, 9, 16, 25
= 5
Therefore, required probability = `\text { Number of tickets bearing perfect number}/text { Total number of tickets}`
`=5/30`
`=1/6`
Hence, the probability that the ticket drawn bears a perfect square number is`=1/6`.
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