A class has three teachers, Mr. , Ms. Q, and Mrs. R and six students A,B,C,D,E,F. Number of ways in which they can be seated in la line of 9 chairs, if between any two teachers there are exactly tow students, is `k !(18),` then value of`k` is ________.

A class has three teachers, Mr. P , Ms. Q, and Mrs. R and six students A,B,C,D,E,F. Number of ways in which they can be seated in a line of 9 chairs, if between any two teachers there are exactly two students, is k !(18), then value ofk is ________.

A class has tree teachers, Mr. X , Ms. Y and Mrs. Z and six students A , B , C , D , E , F . Number of ways in which they can be seated in a line of 9 chairs,if between any two teachers there are exactly two students is

There are 6 students A,B,C,D,E,F. In how many ways can they be seated in a line so that C and D do not sit together?

Number of ways in which 4 students can sit in 7 chair in a row, if there is no empty chair between any two students is :

Six teachers and six students have to sit round a circular table such that thereis a teacher between any two students.The number of ways in which they can sit is

A team of four students is to be selected from a total of 12 students.The total number of ways in which the team can be selected such that two particular students refuse to be together and other two particular students wish to be together only is equal to a.220 b.182 c.226 d.none of these

The number of ways in which 10 persns can sit around a table so that they do not have sam neighbour in any tow arrangements? (A) 9! (B) 1/2(9!) (C) 10! (D) 1/2(10 )

Six persons A, B, C, D, E and F are to be seated at a circular table . The number of ways this can be done if A must have either B or C on his right and B must have either C or D on his right is

Six persons A, B, C, D, E and Fare to be seated at a circular table. Then the number of ways can this be done if A must always has either B or Con his right and B must always has either C or D in his right is