Two unbiased dice are thrown. Find the probability that six may be obtained as product
6/12
4/12
6/9
1/9
If A and B are two events in a sample space then
p(A?B)?p(A)+p(B)
p(A?B)=p(A)+p(B)
none of these
Two cards are drawn successively with replacement from a well-shuffled pack of 52 cards. The probability of drawing two aces is
1/13
1/52
If
p(A)
1-p(A)
p(A)-1
1-(p(A))2
If two dice are tossed ,the probability that the product of numbers thrown will be greater than 23 is
5/36
7/36
1/6
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
A die is thrown twice. The probability that at least one of the two items comes up with the number 3 is
5/12
11/36
1/12
7/24
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
