If `n` biscuits are distributed among `N` beggars, find the chance that a particular beggar will get `r(

If n toys are distributed among N boys randomly, then the probability that a particular boy gets r(lt n) toys is

In how many ways can 15 identical blankets be distributed among six beggars such that everyone gets at least one blanket and tow particular beggars get equal blankets and another three particular beggars get equal blankets.

If ten objects are distributed at random among ten persons, then find the probability that at least one of them will not get any object.

If 4 different biscuits are distributed among 3 children at random, the probability that the first child receives exactly one biscuit is

If 10 objects are distributed at random among 10 persons,then find the probability that at least one of them will not get anything.

Find the number of ways in which you can distribute 12 chocolates among 3 kids, such that there is one particular kid who gets the chocolates in the multiples of 3 only and no kid gets less than 1 chocolate.

7 distinct toys are distributed among 4 boys in such a way that any three get each 2 toys and forth gets 3 toys. Find No of ways.

Ninety coins are to be distributed among P,Q and R such that P gets twice as many coins as Q gets and Q gets thrice as many coins as R gets. Find the number of coins R gets.

In how many ways can 21 identical blankets be distributed among three beggars so that exactly two of them get equal number of blankets.