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प्रश्न
Hundred identical cards are numbered from 1 to 100. The cards are well shuffled and then a card is drawn. Find the probability that the number on the card drawn is greater than 85.
उत्तर
There are 100 cards from which one card is drawn.
Total number of elementary events = n(S) = 100
From numbers 1 to 100, there are 15 numbers which are greater than 85 i.e. {86, 87, ......, 98, 99, 100}
Favorable number of events = n(E) = 15
Probabilty of selecting a card with a number greater than 85
= `(n(E))/(n(S))`
= `15/100`
= `3/20`
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