There are counters available in x different colours. The counters are all alike except for the colour.The total number of arrangements consisting of y counters, assuming sufficient number of counters ofeach colour, if no arrangement consists of all counters of the same colour is :

There are counters available in 3 different colours (atleast four of each colour). Counters are all alike except for the colour. If 'm' denotes the number of arrangements of four counters if no arrangement consists of counters of same colour and 'n' denotes the corresponding figure when every arrangement consists of counters of each colour, then :

There are counters available in 8 different colours (atleast 10 of each colour) Counters are at alike except for the colour.same colours Number of ways in which 5counters can be selected which consist of atleast2counters of same colour is

There are counters available in 7 different colours.Counters are all alike except colour and they are atleast ten of each colour.Find the number of ways in which an arrangement of 10 counters can be made.How many of these will have counters of each colour?

Do all the photons of differents colour have the same mass? If not, why?

There are 5 white, 4 yellow, 3 green, 2 blue & 1 red ball. The balls are all identical except for colour. These are to be arranged in a line in 5 places. Find the number of distinct arrangements .