What is the least possible numbers of students that can be arranged 12,16 and 18 per each row.

In a class of 10 students there are 3 girls A,B,C the number of different ways that they can be arranged in a row such that no two of the the three girls are consecutive is

Cadets are marching in a parade. There are 5 cadets in each row. What is the rule for number of cadets, for a given number of rows? Use ‘n’ for the number of rows.

Graphically the total number of fundamental spatial arrangements possible are

A boat is to be manned by 9 crew with 4 on the stroke side, 4 on the row side and one to steer. There are 11 men of which 2 can stroke only and 1 can row only while 3 can steer only. The number of ways the crew can be arranged for the boat is

What is common factor of 12 and 18 is?

A boats crew consists of 16 men , 6 of whom can only row on one side and 4 only on the other . The number of ways in which the crew be arranged 8 on each side is

If x is the number of ways in which six women and six men can be arranged to sit in a row such that no two women are together and if y is the number of ways they are seated around a table in the same manner, then x:y=

In a class there are 5 rows and each row is having 2 seats. Find the number of ways to arrange 7 boys such that the first place of each row must be filled