Please refer my talk with Mr Lucky in the morning. following question has been posted by my daughter. She wish to know the answer and its way of presentationbefore subscribing.


"when a group photograph is taken, all 7 teachers should be in the first row and all the 18 students consisting of 12 boys and 6 girls should be in the second row such that no two girls are together and if the middle seat of the first row is reserved for the principal, how many arrangements are possible? "