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प्रश्न
A bag contains tickets numbered 11, 12, 13,..., 30. A ticket is taken out from the bag at random. Find the probability that the number on the drawn ticket is a multiple of 7
उत्तर
Total no. of possible outcomes = 20 {11, 12, 13, ….., 30}
E ⟶ event of getting no. which is multiple of 7
No. of favorable outcomes = 3 {14, 21, 2}
Probability, P(E) =`"No.of favorable outcomes"/"Total no.of possible outcomes"`
P(E) = 3/20
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