There are n stations on a railway line. The number of kinds of tickets printed (no return tickets) is 105. Find the number of stations

On a railway there are 10 stations. The number of types of tickets required in order that it may be possible to book a passenger from every station to every other is

On a railway there are 20 stations. The number of different tickets required in order that it may be possible to travel from every station to every station is

In a network of railways, a small island has 15 stations. Find the number of different types of tickets to be printed for each class, if every stations must have tickets for other stations.

Two types of tickets were sold for a concert held at an amphitheater. Tickets to sit on a bench during the concert cost $75 each, and tickets to sit on the lawn during the concert cost $40 each. Organizers of the concert announced that 350 tickets had been sold and that $19,250 had been raised through ticket sales alone. Which of the following systems of equations could be used to find the number of tickets for bench seats, B, and the number of tickets for lawn seats, L, that were sold for the concert?

There are p intermediate stations on a railway line from one terminus to another . In how many ways a train can stop at 3 of these intermediate stations if no two of those stopping stations are to be consecutive ?

There are 10 stations on a circular path. A train has to stop at 4 stations such that no two stations are adjacent. The number of such selections must be: (a) 25 (b) 35 (c) 210 (d) 50

There are 10 stations on a circular path. A train has to stop at 3 stations such that no two stations are adjacent. The number of such selections must be: (A) 50 (B) 84 (C) 126 (D) 70

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 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.

Tickets are numbered from 1 to 10. Two tickets are drawn one after the other art random. Find the probability that the number on one of the tickets is a multiple of 5 and on the other a multiple of 4.