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 cards are drawn successively with replacement from a well-shuffled pack of 52 cards. The probability of drawing two aces is
1/13
1/13×1/17
1/52×1/51
1/13×1/13
What is the probability of getting a head while tossing a coin
1/2
2
0
What is the resulting sample space if one coin is tossed
{H, H}
{T, T}
{H, T}
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
A die is thrown twice. The probability that atleast one of the two items comes up with the number 3 is
5/12
11/36
1/12
7/24
If two coins are tossed once. What is the probability of getting atleast one head?
1/4
2/4
3/4
A bag contains 10 white and 20 red balls. The probability that a ball drawn at random is white equals
1/3
1/5
A normal die is rolled. The probability that the number on the uppermost face when it stops rolling will not be 5 is
1/6
2/6
3/6
5/6
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