1.
What is the probability that a leap year has 53 Sundays and 52 Mondays?

2.
A bag contains 7 green and 8 white balls. If two balls are drawn simultaneously, the probability that both are of the same colour is -

3.
A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If three marbles are picked at random, what is the probability that they are all blue?

4.
In a party there are 5 couples. Out of them 5 people are chosen at random. Find the probability that there are at the least two couples?

5.
If a number is chosen at random from the set {1, 2, 3, ......., 100}, then the probability that the chosen number is a perfect cube is -

6.
A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If three marbles are drawn what is the probability that one is yellow and two are red?

7.
From a pack of cards two cards are drawn one after the other, with replacement. The probability that the first is a red card and the second is a king is -

8.
A coin is tossed live times. What is the probability that there is at the least one tail?

9.
A box contains 3 blue marbles, 4 red, 6 green marbles and 2 yellow marbles. If two marbles are picked at random, what is the probability that they are either blue or yellow?

10.
10 books are placed at random in a shelf. The probability that a pair of books will always be together is -

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