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प्रश्न
A bag contains 25 cards, numbered through 1 to 25. A card is drawn at random. What is the probability that the number on the card drawn is multiple of 5?
उत्तर
Here n(S) = 25
E1 = Number on the card is a multiple of 5
= {5, 10, 15, 20, 25}
`\implies` n(E1) = 5
Hence P(E1) = `(n(E_1))/(n(S))`
= `5/25`
= `1/5`
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