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प्रश्न
In a certain lottery, 10,000 tickets are sold and ten equal prizes are awarded. What is the probability of not getting a prize if you buy one ticket.
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उत्तर
Number of tickets that are not getting a prize
= 10000 – 10
= 9990
∵ Total number of tickets = 10000
Total ways in which a ticket will not get a prize
= 9990C1
= 9990
Whereas total possible outcomes = 10,000
Probability of not getting a prize with a ticket
= `9990/10000`
= `999/1000`
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