Q 1 – An experiment whose outcomes has to be among a set of events that are completely known but whose exact outcomes is unknown is a
(a) sample space
(b) elementary event
(c) random experiment
(d) none of these
(c) random experiment
Q 2 – The probability that a number selected at random from the numbers 1, 2, 3, 4, …, 15 is a multiple of 4 is
Q 3 – The experiments which when repeated under identical conditions produce the same results or outcomes are known as
(a) random experiments
(b) probabilistic experiment
(c) elementary experiment
(d) deterministic experiment.
(d) deterministic experiment
Q 4 – An event is very unlikely to happen. Its probability is closest to:
(a) 0.0001
(b) 0.001
(c) 0.01
(d) 0.1
(a) 0.0001
Q 5 – If the probability of winning a game is 0.3, the probability of losing it is
(a) 1.3
(b) 1
(c) 0.7
(d) 0.1
(c) 0.7
Q 6 – If an event cannot occur, then its probability is
(a) 1
(d) 0
(d) 0
Q 7 – If the probability of an event is P, the probability of its complimentary event will be:
(a) P – 1
(b) P
(c) 1 – p
(c) 1 – p
Q 8 – Ram and Shyam are friends. The probability that both will have the same birthday is
(d) none of these
Q 9 – In a family of 3 children, the probability of having at least one boy is:
Q 10 – An urn contains lottery tickets numbered from 1 to 100. If a ticket is selected at random, then the probability that it is a perfect
square is
(a) 0.1
(b) 0.08
(c) 0.09
(d) 0.01
(a) 0.1
Q 11 – A bag contains cards which are numbered from 2 to 90. A card is drawn at random from the bag. The probability that it bears
a two-digit number is:
Q 12 – If P(A) denotes the probability of an event then:
(a) P(A) < 0
(b) P(A) > 0
(c) 0 ≤ P(A) ≤ 1
(d) -1 ≤ P(A) ≤ 0
(c) 0 ≤ P(A) ≤ 1
Q 13 – A box contains 3 blue balls, 2 white balls and 4 red balls. If a ball is drawn at random from the box, the probability of getting a white ball is
(d) 1
Q 14 – The probability than a non-leap year selected at random will contain 53 Sundays is:
Q 15 – When a die is thrown, the probability of getting an odd number less them 3 is:
(d) 0
Q 16 – A card is drawn from a deck of 52 cards. The event E is that card is not an ace of hearts. The number of outcomes favourable to E is:
(a) 4
(b) 13
(c) 48
(d) 51
(d) 51
Q 17 – A lot consists of 144 ball pens of which 20 ae defective and the others are good. Tanu will buy a pen if it is good but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. The probability that she will buy that pen is
Q 18 – The probability of getting a bad egg in a lot of 400 is 0.035. The number of bad eggs in the lot is:
(a) 7
(b) 14
(c) 21
(d) 28
(b) 14
Q 19 – A coin is tossed twice. The probability of getting both heads is
Q 20 – A girl calculates that the probability of her winning the first prize in a lottery is 0.08. If 6000 tickets are sold, how many tickets has she bought?
(a) 40
(b) 240
(c) 480
(d) 750
(c) 480
Q 21 – One ticket is drawn at random from a bag containing tickets numbered 1 to 40. The probability that the selected ticket has a number which is a multiple of 5 is:
Q 22 – The probability of getting exactly one head in tossing a pair of coins is
(a) 0
(b) 1
Q 23 – The total number of events of throwing 10 coins simultaneously is
(a) 1024
(b) 512
(c) 100
(d) 10.
(a) 1024
Q 24 – The total events to throw three dice simultaneously is
(a) 6
(b) 18
(c) 81
(d) 216
(d) 216