Let 0 < P(A) < 1 . 0 <P(B) < 1 and P(A ∪ B) = P(A) + P(B) - P(A) P(B) then
P(B/A) = P(B) - P(A)
P(A/B) = P(A) - P(Bc)
P(A∪B)c = P(A)c . P(B)c
P(Ac∪Bc) = P(Ac) + P(Bc)
Three houses are available in a locality.Three persons apply for the houses.Each applies for one house without consulting the others.The probability that all the three apply for the same house is
1/9
2/9
7/9
8/9
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
One card is drawn from a pack of 52 cards each of the 52 cards being equally likely to be drawn, then the probability that the card drawn is an ace is.
1/4
1/13
1/2
1/52
The probability that a leap year will contain 53 Sundays is
1/7
2/7
4/7
5/7
A coin is tossed and a dice is rolled.The probability that the coin shows the head and the dice shows 6 is
1/6
1/12
1/24
Two dice are thrown simultaneously , then the probability of getting an even number as the sum is
1/3
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
7/24
The probability that at least one of the events A and B occurs is 0.6.If A and B occur simultaneously with probability 0.2, then the value of
1.2
1.4
0.8
0.4
In a non-leap year the probability of getting 53 Sundays or 53 Tuesdays or 53 Thursdays is
3/7
