Andy C. answered • 07/15/18

Math/Physics Tutor

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There are 6 positions that Arun can be assigned,

namely positions 2,3,4,5,6,7;

Once that selection is made, there are only 5 positions left, besides the first

THere are 7 students that can fill the 1st position

There are 6 students to fill the one of the 5 positions left.

There are 5 students to fill one of the 4 positions left

There are 4 students to fill one of the 3 positions left

There are 3 students to fill one of the 2 positions left

There are 2 students to fill the last of position

The remaining student will be last (position 8)

6*7*6*5*4*3*2 = 30240