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4) There are 10 persons, among whom two are friends. Find the number
of ways in which they can be arranged around a circle. A

By Rylee

4) There are 10 persons, among whom two are friends. Find the number
of ways in which they can be arranged around a circle. Also find
the number of arrangements in which :
(a) exactly one person is there between the two friends.
(b) the two friends are always separated.​

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Rylee

Shruti is a dance teacher. She teaches various forms of dances in her class which are classical, hip hop, contemporary and salsa s

(iii) A bag contains 3 red, 3 white and 3 green balls of the same size. One ball is
taken out of the bag at random, what is t

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