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In a box,there are 20 cards,out of which 10 cards are labeled as A and remaining as B .Cards are drawn one after other with replacement,till a second A card is obtained.The probability that the second A card is obtained before third B card is

There are hundred cards in a bag on which numbers from 1 to 100 are written. A card is taken out from the bag at random. Find the probability that the number on the selected card. is a prime number greater than 80.

There are 100 cards in a bag on which numbers from 1 to 100 are written. A card is taken out form the bag at random. Find the probability that the number on the selected card is divisible by 25

There are hundred cards in a bag on which numbers from 1 to 100 are written. A card is taken out from the bag at random. Find the probability that the number on the selected card. It is divisible by 9 and is a perfect square

There are cards in a bag numbered from 7 to 100 . A card is taken out from the bag at random . Find the probability that the number on the selecteed card : Is an even perfect square .