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
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
1/8
3/7
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
Three unbiased coins are tossed what is the probability of getting at most two heads ?
1/4
3/8
7/8
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
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
2/10
1/10
If P(B)= 3/4 ,
1/6
1/12
1/15
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
Total probability of an event =
0
0.5
0.75
Ticket numbered 1 to 20 are mixed up and then a ticket is drawn at random .What is the probability that the ticket drawn has a number which is a multiple of 3 or 5 ?
1/2
2/5
8/15
9/20
