In a throw of dice, the probability of getting a prime number is
2
1/2
3/2
6
In a class of 15 children ,3 of them speak Hindi at home. What is the probability that a randomly selected child speaks Hindi at home ?
1/6
1/9
1/5
The numbers 1,2,3, and 4 are written separately on four slips of paper.The slips are put in a box and mixed thoroughly.A person draws two slips from the box, one after the other without replacement.Then the sample space for the experiment is
S = {(1,4), (1,3), (1, 2) , (2, 0) , (2, 1) , (2, 3), (3, 1) , (3, 2) , (3, 4) , ( 4, 0) , (4, 1) , (4, 3) }
S = {(1, 1), (1, 2) , (1, 3) , (2, 1) (2, 2) (2,3), (3,1) , (3,2) ,(3,4) , (4,0) , (4,1) , (4, 3) }
S = {(1,2), (1,3), (1,4 ), (2, 1) , (2, 3), (2, 4), (3, 1) , (3, 2), (3, 4) , (4, 1), (4, 2) , (4, 3)}
None of these
A book containing 100 pages is opened at random.The probability that a doublet page is found as :
9/100
90/100
10/100
20/100
The probability that in a family of 3 children, there will be at least one boy is
7/8
1/8
4/8
6/8
Three identical coins are tossed together what is the probability of obtaining all heads ?
3/7
3/8
The probability of getting an even number when a die is rolled is
1/36
Three letters, to each of which corresponds an addressed envelope are placed in the envelopes at random.The probability that all letters are placed in the right envelopes is
1/3
1
0
The probability of getting a number greater than or equal to 2 or an even number in a single throw of a fair dice is
2/3
5/6
The probability that a vowel selected at random in English language is an " i " is
1/26
