Two dice are thrown at a time.The probability that the difference of the numbers shown on the dice is 1 is
5/18
1/36
1/6
None of these
A and B are friends.What is the probability that both will have same birthdays?
364/365
1/365
2/365
A bag contains 3 white and 5 red balls.If a ball is drawn at random,the probability that the drawn ball to red is :
3/8
5/8
3/15
5/15
The probability of getting a number greater than 2 or an even number in a single throw of a fair dice is
1/3
2/3
5/6
If a coin is tossed twice, the probability of getting at least one head is :
1/2
1/4
3/4
The probability that a vowel selected at random in English language is an " i " is
1/5
1/26
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
The probability for a randomly selected number out of 1,2,3,4, -----, 25 to be a prime number is
2/25
23/25
10/25
9/25
The probability of getting an even number when a die is rolled is
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
0
