If
p(A)
1-p(A)
p(A)-1
1-(p(A))2
If p(A∩B)=1/4 ,p(A'∩B')=1/5 and p(A)=p(B)=p then p=
1/20
21/40
11/40
None
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
The probability of getting either 1 or 2 when a die is thrown is
1/4
1/2
1/6
1/3
If two dice are tossed ,the probability that the product of numbers thrown will be greater than 23 is
5/36
7/36
A problem in mathematics is given to 3 students whose chances of solving individually are 1/2,1/3 and 1/4 .The probability that the problem will be solved atleast by one is
1/24
23/24
3/4
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
If two coins are tossed once. What is the probability of getting atleast one head?
2/4
A die is rolled .If the outcome is an even number, what is the probability that it is a prime number
3/6
2/3
If A and B are mutually exclusive events, then p(A∩B)=
p(A).p(B)
0
p(A)+p(B)
None of these