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प्रश्न
Nine cards (identical in all respects) are numbered 2 to 10. A card is selected from them at random. Find the probability that the card selected will be an even number.
योग
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उत्तर
There are 9 cards from which one card is drawn.
Total number of elementary events = n(S) = 9
From numbers 2 to 10, there are 5 even numbers i.e. 2, 4, 6, 8, 10
Favorable number of events = n(E) = 5
Probability of selecting a card with an even number = `(n(E))/(n(S)) = 5/9`
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