Two friends `Aa n dB` have equal number of daughters. There are three cinema tickets which are to be distributed among the daughters of `Aa n dB` . The probability that all the tickets go to the daughters of `A` is 1/20. Find the number of daughters each of them have.

Two friends A and B have equal number of daughters.There are thre cinema tickets which are to be distributed among the daughters of A and B .The probability that all the tickets go to to the daughters of A is 1/20 . Find the number of daughters each of them have.

Two friends A and B have equal number of sons. There are 3 cinema tickets which are to be distributed among the sons of A and B. The probability that all the tickets go to the sons of B is 1//20 . The no. of sons each of them having is

Two different families A and B are blessed with equal number of children. There are 3 tickets to be distributed amongst the children of these families so that no child gets more than one ticket. If the probability that all the tickets go to children of the family B is (1)/(12) then the number of children in each family is :

In a Iottery of 50 tickets numbered 1 to 50 , two tickets are drawn simultaneously . Find the probability that both the tickets drawn have prime numbers ,

Out of (2n +1) tickets cosecutively numbered, three are drawn of random, find the probability that the three number on them are in A.P.

Out of 2n tickets numbered 1,2,......,2n three are chosen at random.The probability that the numbers on them are in A.P.is

In a lottery of 100 tickets numbered 1 to 100 two tickets are drawn simultaneously . Find the probabilty that both the ticktets drawn have prime numbers.