Question 929357
when 7 students went for a trip they found a hotel of 3 rooms:
 1 for 1 person ,2 for 2 people,3 for 3 people if one sleep in the car .
how many ways can they be assigned. (one of the 7 in the car, the other 6 in hotel) 
6(6C1)(5C2)(3C3)