Six persons are standing in random order in a aqeue to buy tickets individually. Three of them have a ten rupee note each while the other three have a five rupee note each. The booking clerk has an empty cash box. Find the probability that all the 6 persons will get a ticket each without having to wait. Each ticket costs rupees 5.

8 Children are standing in a line outside a ticket counter at zoo. 4 of them have a 1 rupee coin each & the remaining four have a 2 rupee coin each. The entry ticket costs 1 rupee each. If all the arrangements of the 8 children are random, the probability that no child will have to wait for a change, if the cashier at the tickets window has no- change to start with is K . Then 15K is equal to

8 Children are standing in a line outside a ticket counter at zoo. 4 of them have a 1 rupee coin each & the remaining four have a 2 rupee coin each. The entry ticket costs 1 rupee each. If all the arrangements of the 8 children are random, the probability that no child will have to wait for a change, if the cashier at the tickets window has no- change to start with is K . Then 15K is equal to

I have Rs 1000 in ten and five rupee notes. If the number of ten rupee notes that I have is ten more than the number of five rupee notes, how many notes do I have in each denomination?

I have Rs 1000 in ten and five rupee notes. If the number of ten rupee notes that I have is ten more than the number of five rupee notes, how many notes do I have in each denomination?

There are n+ 3(n > 1) seats numbered 1, 2, 3, , n + 3. There are also n+ 3 persons who are holding tickets numbered 1, 2, 3, . . . , n + 3. They take seats at random. Find the probability that exactly three persons take seats having the same numbers as that in their tickets.

If I change 3 hundred rupee notes in the form of 5 and 10 rupee notes and get 48 notes in total. Let’s find out how many notes of each type I would 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

A game consists of tossing a one-rupee coin three times, and noting its outcomee each time. Find the probability of getting (i) three heads, (ii) at least 2 tails.

A game consists of tossing a one-rupee coin three times and noting its outcome each time. Hanif wins if all the tosses give the same result, i.e., three heads or three tails and loses otherwise. Calculate the probability that Hanif will lose the game.