Total probability of an event =
0
0.5
0.75
1
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
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
Two dice are thrown simultaneously ,then the probability of getting an even number as the sum is
1/2
1/3
1/4
1/7
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
8/21
The probability that a leap year will contain 53 Sundays is
5/7
4/7
2/7
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
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
9/52
If A and B are two independent events then the value of P(A/B) is
P(A)
P(B)
If P(B)= 3/4 ,
1/6
1/12
1/15
