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प्रश्न
Cards bearing numbers 3 to 20 are placed in a bag and mixed thoroughly. A card is taken out of the bag at random. What is the probability that the number on the card taken out is an even number?
विकल्प
`9/17`
`1/2`
`5/9`
`7/18`
उत्तर
`bb(1/2)`
Explanation:
Total number of card = 18
n(S) = 18
A = Even numbers from 3 to 20
(A) = 4, 6, 8, 10, 12, 14, 16, 18, 20
n(A) = 9
Required probability P(A) = `(n(A))/(n(S)) = 9/18`
P(A) = `1/2`
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