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1.
Let 
be two mutually exclusive events of an experiment with 
not
.Then, 
is equal to
be two mutually exclusive events of an experiment with not.Then, is equal to
2.
If two events 
and 
are such that 
then 
and are such that then
3.
The odds against a certain event are 5 :2 and the odds in favour of another independent event are 6 : 5. The probability that at least one of the events will happen, is
4.
and are two independent events such that their probabilities are 
and 
respectively. The probability of exactly one of the events happening is
and are two independent events such that their probabilities are and respectively. The probability of exactly one of the events happening is
5.
A fair coin is tossed a fixed number of times. If the probability of getting 4 heads equals the probability of getting 7 heads, then the probability of getting 2 heads is
6.
If 
, then 
is equal to
, then is equal to
7.
A bag contains 7 red and 2 white balls and another bag contains 5 red and 4 white balls. Two balls are drawn, one from each bag. The probability that both the balls are white, is
8.
If 
and 
, then which one of the following is correct?
and , then which one of the following is correct?
9.
A speaks truth 4 out of 5 times. A die is tossed. He reports that there is a six. The probability that actually there was a six, is
10.
There are 12 white and 12 red balls in a bag. Balls are drawn one by one with replacement from the bag. The probability that 7th drawn ball is 4th white, is