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
1/4
1/24
23/24
3/4
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 of these
A bag contains 10 white and 20 red balls. The probability that a ball drawn at random is white equals
1/3
1/2
1/5
The probability of getting either 1 or 2 when a die is thrown is
1/6
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
1
A die is rolled .If the outcome is an even number, what is the probability that it is a prime number
3/6
2/3
What is the probability that there are 53 Sundays in a leap year ?
1/7
2/7
3/7
4/7
A normal die is rolled.The probability that the number on the uppermost face when it stops rolling will not be 5 is
2/6
5/6
Two unbiased dice are thrown. Find the probability that six may be obtained as product
6/12
4/12
6/9
1/9
A die is thrown twice. The probability that atleast one of the two items comes up with the number 3 is
5/12
11/36
1/12
7/24
