There are 3 events A, B and C,only one of which must can happen. The odds against event A are `7:4` and against event B are `5:3`. Find the odds against event C.

Ina single toss of a fair die, what are the odds against the event that number 3 ar 4 turns up?

If the odds against an event be 2 : 3, then the probability of its occurrence is

If the odds against an event be 2 : 3, then the probability of its occurrence is

The odds against a husband who is 60 years old, living till he is 85 are 7:5 . The odds against his wife who is now 56, living till she is 81 are 5:3 . Find the probabilty that: at least one of them will be alive 25 years hence.

The odds in favour of the occurrence of an event are 3:5 . Find the probability of the non-occurrence of the event.

The odds against a husband who is 60 years old, living till he is 85 are 7:5 . The odds against his wife who is now 56, living till she is 81 are 5:3 . Find the probabilty that: exactly one of them will be alive 25 years hence.