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
Three unbiased coins are tossed what is the probability of getting at most two heads?
3/4
3/8
7/8
Total probability of an event =
0
0.5
0.75
1
If two coins are tossed once. What is the probability of getting at least one head?
2/4
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
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
The probability of getting at least one tail in 4 throws of a coin is
15/26
15/16
1/8
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
1/9
2/9
2/10
1/10
If A and B are two independent events then the value of P(A/B) is
P(A)
P(B)
In a school of 50 students there are 35 girls and rest are boys.Then the probability that a selected student will be a boy is
3/10
1/5
7/5
4/5