probability lawn.

What is the probability that none of the

chairs picked is white ?
1. Tickets numbered 1 to 20 are mixed up and then a A)14/33B)14/55C)12/55D)13/33
ticket is drawn at random. What is the probability 19. What is the probability of an impossible event?
that the ticket drawn has a number which is a A)0B)1C).1D)-1
multiple of 3 or 5? A)1/2B)3/5C)9/20D)8/15 20. From well shuffled standard pack of 52 playing
2. A bag contains 6 white and 4 black balls .2 balls cards,one card is drawn. What is the probability
are drawn at random. Find the probability that they that it is either a red card or black card?
are of same colour? A)1/2B)7/15C)8/15D)1/9 A)1B)1/2C)1/3D)1/4
3. Two cards are drawn at random from a pack of 52 21. A bag contains 4 red balls, 6 blue balls and
cards.what is the probability that either both are 8 pink balls. One ball is drawn at random
black or both are queen? and replace with 3 pink balls. A probability
A)52/221B)55/191C)55/221D)12/21 that the first ball drawn was either red or
blue in colour and the second ball drawn
4. A bag contains 4 white, 5 red and 6 blue balls.
was pink in colour?.
Three balls are drawn at random from the bag.
The probability that all of them are red, is? A)11/30B)11/36C)12/21D)13/17
A)2/91B)1/22C)3/22D)2/77 22. Two coins are tossed. What is the
5. There are 2 sections A and B of a class consisting 36 probability that
(i) at least one head occurs
and 44 students respectively. If the average weight of
(ii) at least one tails occurs?
section A is 40 kg and that of section B is 35 kg, find the
A)3/4B)1/4C)1/2D)1
average weight of the whole class.A)B)C)D)
23. A bag contains 6 apple, 5 Banana and (x+4)
6. Two dice are tossed. The probability that the total
Orange. If two fruits are taken at random and the
score is a prime number is: A)5/12B)1/6C)1/2D)7/9
probability of getting both are apple is 1/14, then
7. A man and his wife appear in an interview for two find the value of x.
vacancies in the same post. The probability of A)5B)6C)4D)8
husband's selection is (1/7) and the probability of
24. A box contains 21 balls numbered 1 to 21. A ball is
wife's selection is (1/5). What is the probability that
drawn and then another ball is drawn without
only one of them is selecte?.A)2/7B)1/7C)3/4D)4/5
replacement. What is the probability that both balls
8. From a pack of 52 cards, two cards are drawn are even numbered?
together at random.What is the probability of both A)2/7B)8/21C)3/14D)5/21
the cards beingking.A)1/221B)3/221C)4/221D)5/221
25. A box contains slips with numbers from 1 to 50
9. Two cards are drawn together from a pack of 52 written on them. A slip is drawn and replaced.
cards. The probability that one is a spade and one Then another slip is drawn and after replacing
is a heart, is. A)3/20B)29/34C)47/100D)13/102 another slip is drawn. What is the probability that
10. Three unbiased coins are tossed. What is the an even number appears on the first draw, an odd
probability of getting at most two heads? number on the second draw and a number
A)3/4B)7/8C)1/2D)1/4 divisible by 3 on the third
11. What is the probability of getting a sum 9 from two draw? A)1/25B)2/25C)4/25D)8/25
throws of a dice?.A)1/2B)1/9C)3/4D)2/9 26. A committee of 3 members is to be made out of 6
12. Three unbiased coins are tossed.What is the men and 5 women. What is the probability that the
probability of getting at least 2heads?? committee has at least two women?
A)1/4B)1/2C)1/3D)3/4 A)10/33B)14/33C)13/25D)14/15
13. In a class, there are 15 boys and 10 girls. Three 27. Two cards are drawn at random from a pack of 52 cards.
students are selected at random. The probability What is the probability that either both are black or both
that 1 girl and 2 boys are selected, is:. are queens?. A)5/21B)55/221C)555/2221D)5555/2221
A)21/46B)1/5C)3/25D)1/50 28. A box contains 5 green, 4 yellow and 3 white marbles.
14. Two dice are thrown together .What is the Three marbles are drawn at random. What is the
probability that the sum of the number on the two probability that they are not of the same
faces is divided by 4or6A)7/18B)14/35C)8/18D)7/35 color? A)3/44B)3/55C)52/55D)41/44
15. From a pack of 52 cards, 3 cards are drawn. What 29. A bag contains 2 red, 3 green, and 2 blue balls. two balls
is the probability that one is ace, one is queen and are drawn at random. What is the probability that none
one is jackA)19/5525B)16/5525C)17/5525D)21/5525 of the balls drawn is blue
16. A word consists of 9 letters; 5 consonants and 4 A)10/21B)11/21C)2/7D)5/7
vowels.Three letters are choosen at random. What 30. A bag contains 2 red, 3 green, and 2 blue balls. two balls
is the probability that more than one vowel will be are drawn at random. What is the probability that none
selected A)13/42B)17/42C)5/42D)3/14 of the balls drawn is blue?
17. fifteen persons are sitting around a circular table A)3/22B)2/11C)3/23D)2/23
facing the centre. What is the probability that three 31. A coin is tossed three times randomly. What is the
particular persons sit together ? probability of getting the same face?
A)3/91B)2/71C)1/91D)5/91 A)1/2B)1/4C)1/8D)1/16
18. A room contains 3 brown, 5 black and 4 white
chairs. Two chairs are picked and are put in the