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 atrandom from the bag.What is the probability that the ball chosen is blue or red?
6/20
8/20
14/20
1
If A and B are two independent events then the value of P(A/B ) is
0
P(A)
P(B)
One card is drawn at random from a pack of 52 cards .What is the probability that the cards drawn is a face card (Jack, Queen , and king only ?
1/13
3/13
1/4
9/52
The probability of getting at least one tail in 4 throws of a coin is
15/26
15/16
1/8
In a box,there are 8 red,7 blue and 6 green balls .One ball is picked up randomly.What is the probability that it neither red nor green .
3/4
7/19
1/3
8/21
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
2/9
3/9
5/9
1/9
Total probability of an event =
0.5
0.75
A bag contains 2 red,3 green and 2 blue balls.Two balls are drawn at random.What is the probability that none of the balls drawn is blue ?
1/21
10/21
2/7
5/7
Two dice are thrown simultaneously ,then the probability of getting an even number as the sum is
1/2
1/7
A bag contains 6 black and 8 white balls .One ball is drawn at random .What is the probability that the ball drawn is white ?
4/7
3/7
