A bag contains 10 white and 20 red balls. The probability that a ball drawn at random is white equals
1/3
1/2
1/4
1/5
A die is rolled .If the outcome is an even number, what is the probability that it is a prime number
1/6
3/6
2/3
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
Two unbiased dice are thrown. Find the probability that six may be obtained as product
6/12
4/12
6/9
1/9
A normal die is rolled.The probability that the number on the uppermost face when it stops rolling will not be 5 is
2/6
5/6
If A and B are mutually exclusive events, then p(A∩B)=
p(A).p(B)
0
p(A)+p(B)
None of these
E and F are two events associated with a random experiment for which p(F)=0.35 ,p( E or F)=0.85 , p(Eand F)=0.15.Find p(E)
0.35
0.65
0.5
0.25
If A and B are two events such that p(A)=1/4 ,p(B)=1/2 and p(A and B)=1/8 .Then p(notA and notB) is
1/8
3/8
5/8
7/8
Suppose an outcome A occurs m times out of n equally likely outcomes in an experiment.Then odds in favour of A =
n/m
m/n
(n-m)/m
m/(n-m)
What is the probability of getting a head while tossing a coin
2
