Question

NO LINKS WHATSOEVER!!! SPAMMERS WILL BE IMMEDIATELY REPORTED!!! A gardener plants a row of eight trees chosen from three maples, two oaks, and four birches. In how many ways can he plant the row?

Answer 1

Answer: 362,880

Step-by-step explanation: At first glance of the question, it doesn't seem that the order matters, which would make it a question of how many combinations there are.  The simple way to look at it is that there are 9 trees and he's planting 8, leaving out 1.  Since there are 9 possible trees to leave out, there are 9 possible combinations of which 8 trees to plant.  

The formula would be 9!/([9-8]!*8!) = 9

If the question is indeed asking for permutations (order matters), since you are choosing 8 out of 9 the formula would be 9!/(9-8)! = 9!/1! = 9! = 362,880