Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn bears a number which is a multiple of 3?
2.
In a class, 30% of the students offered English, 20% offered Hindi and 10% offered both. If a student is selected at random, what is the probability that he has offered English or Hindi?
3.
A bag contains 6 white and 4 red balls. Three balls are drawn at random. What is the probability that one ball is red and the other two are white?
4.
Two cards are drawn from a pack of 52 cards. The probability that either both are red or both are kings, is:
5.
The probability that a card drawn from a pack of 52 cards will be a diamond or a kingis :