There are four letters and four envelopes ,then the probability for all the letters not despatching in the right envelope is
19/24
21/23
23/24
25/26
Nine playing cards are numbered 2 to 10 .A card is selected from them at random. probability that the card will be a multiple of 4 is
1/9
2/9
2/10
1/10
Ticket numbered 1 to 20 are mixed up and then a ticket is drawn at random .What is the probability that the ticket drawn has a number which is a multiple of 3 or 5 ?
1/2
2/5
8/15
9/20
A bag contains 20 coloured balls.8 are red,6 are blue,3 are green,2 are white and 1 is brown.A ball is chosen at random from the bag.What is the probability that the ball chosen is blue or red?
6/20
8/20
14/20
1
The probability of getting at least one tail in 4 throws of a coin is
15/26
15/16
1/4
1/8
What is the probability of getting a sum 9 from two throws of a disc ?
1/6
1/12
From a pack of 52 cards, two cards are drawn together at random .What is the probability of both the cards being kings ?
1/15
25/57
35/256
1/221
Total probability of an event =
0
0.5
0.75
If two coins are tossed once. What is the probability of getting at least one head?
2/4
3/4
Three houses are available in a locality .Three persons apply for the houses .Each applies for one house with out consulting the others.The probability that all three apply for the same house is
3/9
5/9
