simple and compound Probability

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

• 1/2

• 2/5

• 8/15

• 9/20

A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?

• 10/21

• 11/21

• 2/7

• 5/7

In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?

• 1/3

• 3/4

• 7/19

• 9/21

What is the probability of getting a sum 9 from two throws of a dice?

• 1/6

• 1/8

• 1/9

• 1/12

Three unbiased coins are tossed. What is the probability of getting at most two heads?

• 3/4

• 1/4

• 3/8

• 7/8

Two dice are thrown simultaneously. What is the probability of getting two numbers whose product is even?

• 1/2

• 3/4

• 3/8

• 5/16

In a class, there are 15 boys and 10 girls. Three students are selected at random. The probability that 1 girl and 2 boys are selected, is:

• 21/46

• 25/117

• 1/50

• 3/25

In a lottery, there are 10 prizes and 25 blanks. A lottery is drawn at random. What is the probability of getting a prize?

• 1/10

• 2/5

• 2/7

• 5/7

From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings?

• 1/15

• 25/57

• 35/256

• 1/221

Two dice are tossed. The probability that the total score is a prime number is:

• 1/16

• 5/12

• 1/2

• 7/9