There are 20 persons among whom are two brothers. The number of ways in which we can arrange them around a circle so that there is exactly one person between the two brothers, is
There are 20 people among whom two are sisters. Find the number of ways in which we can arrange them around a circle so that there is exactly one person between the two sisters.
There are fifty persons among whom 2 are brothers. The number of ways they can be arranged in a circle, if there is exactly one person between the two brothers, is
The number of ways of arranging 7 persons around a circle is
There are n persons (n>=3), among whom are A and B, who are made to stand in a row in random order.Probability that there is exactly one person between A and B is
The number of ways of arranging 9persons around a circle if there are two other persons between two particular persons is:
There are n persons (n ge 3) , among whom are A and B, who are made to stand in a row in random order. Probability that there is exactly one person between A and B is
FIITJEE-PERMUTATIONS & COMBINATIONS-NUMERICAL BASED
