Find the probability of getting a prime number, when a card drawn at random from the numbered cards from 1 to 25.

Find the mean and standard deviation of the probability distribution of the number obtained when a card is drawn at random from a set of 7 cards numbered 1 to 7.

Cards numbered 1,3,5, . .,35 are kept in a bag. If a card is drawn at random from the bag, find the probability that the number on the card is i] a prime number ii] a number divisible by 3 and 5.

20 cards are numbered from 1 to 20. One card is then drawn at random. What is the probability that the number on the card drawn is (i) a prime number ? (ii) an odd number ? (iii) a multiple of 5? (iv) not divisible by 3 ?

A bag contains cards numbered from 1 to 49. A card is drawn from the bag at random, after mixing the card thoroughly. Find the probability that the number on the drawn card is (i) an odd number (ii) a multiple of 5 (iii) a perfect square (iv) an even prime number.

A bag contains cards numbered from 1 to 49. A card is drawn from the bag at random,after mixing the card thoroughly.Find the probability that the number on the drawn card is (i) an odd number (ii) a multiple of 5(iii) a perfect square (iv) an even prime number.

A box contains cards numbered from 1 to 20. A card is drawn at random from the box. Find the probability that number on the drawn card is (i) a prime number (ii) a composite number (iii) a number divisible by 3

Cards numbered 1 to 30 are put in a bag. A card is drawn at random from the bag. Find the probability that the number on the drawn card is (i) not divisible by 3, (ii) a prime number greater that 7, (iii) not a perfect square number.

Cards are numbered 1 to 25 . Two cards are drawn at random . Find the probability that number on one card is a multiple of 7 and on the other is a multiple of 11.

Cards are numbered 1 to 25 . Two cards are drawn at random. Find the probability that number on one card is a multiple of 7 and on the other is a multiple of 11