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
What is the resulting samplespace if one coin is tossed
{H,H}
{T,T}
{H,T}
0
A bag contains 10 white and 20 red balls. The probability that a ball drawn at random is white equals
1/3
1/2
1/4
1/5
If two dice are tossed ,the probability that the product of numbers thrown will be greater than 23 is
5/36
7/36
1/9
If
p(A)
1-p(A)
p(A)-1
1-(p(A))2
If p(A∩B)=1/4 ,p(A'∩B')=1/5 and p(A)=p(B)=p then p=
1/20
21/40
11/40
none
In a non-leap year the probability of getting 53 Sundays or 53 Tuesdays or 53 Thursdays is
1/7
2/7
3/7
4/7
A problem in mathematics is given to 3 students whose chances of solving individually are 1/2,1/3 and 1/4 .
The probability that the problem will be solved atleast by one is
1/24
23/24
3/4
A single letter is selected at random from the word PROBABILITY .The probability that it is a vowel is
4/11
7/11
3/11
none of these
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
