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प्रश्न
There are 15 tickets in a box, each bearing one of the numbers from 1 to 15. One ticket is drawn at random from the box. Find the probability of event that the ticket drawn - shows an even number.
उत्तर
Sample Space (S) = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}
∴ n(S) = 15
Event A: the ticket shows an even number
A = {2, 4, 6, 8, 10, 12, 14}
∴ n(A) = 7
∴ `P (A) = (n(A))/(n(S))`
= `7/15`
Hence, the probability that the ticket shows an even number is `7/15`.
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