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
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
Three identical coins are tossed together what is the probability of obtaining all heads ?
1/6
3/7
3/8
When two dice are thrown, the probability of getting a number always greater than 4 on the second dice is
1/3
1/36
None of these
If a coin is tossed twice, the probability of getting at least one head is :
1/2
1/4
3/4
Two dice are thrown at a time.The probability that the difference of the numbers shown on the dice is 1 is
5/18
From a normal pack of cards, a card is drawn at random.The probability of getting a jack or a king is :
2/52
1/52
2/13
The probability of getting an even number when a die is rolled is
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 :
5/8
3/15
5/15
