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
1/6
0
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
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
1/4
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
A card is drawn from a packet of 100 cards numbered 1 to 100.The probability of drawing a number which is a square is:
1/10
9/100
1/100
2/100
In a single throw of a dice, find the probability of getting a number is not greater than 2?
1/2
2/3
The chance that a non -leap year contains 53 Saturdays is :
2/7
1/7
2/365
1/365
The probability of getting a number greater than 2 or an even number in a single throw of a fair dice is:
5/6
4/2
In a throw of dice, the probability of getting a prime number is:
2
3/2
6
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
2/12
