There are three events A, B, C one of which must and only one can happen, the odds are 8 to 3 against A, 5 to 2 against B, find the odds against C.

There are three events A, B and C one of which must , and only one can happen, the odd are 7 to 3 against A and 5 to 9 for B. Find the odds, against C.

There are three events A, B and C of which one and only one can happen. If the odds are 7 to 4 against A and 5 to 3 against B, then odds against C is

There are three events A, B, and C, one of which one and only one can happen. The odds are 7 to 4 against A and 3 to 5 favour of B. Find the odds against C.

There are three events A,B and C one of which and only one can happen.The odds are 7 to 3 against A and 6 to 4 against B. The odds against C are

There are three events E_1, E_2 and E_3 one of which must, and only one can happen. The odds are 7 to 4 against E_1 and 5 to 3 against E_2 . Find odds against E_3 .

There are three evens E_(1),E_(2) and E_(3) one of which must, and only one can happen. The odds are 7 to 4 against E_(1) and 5 to 3 against E_(2) . Find odds against E_(3) .