Ten elementary school students are eligible to be appointed to two positions: attendance taker and lunch counter. How many unique arrangements of these two positions are possible?
1 Answer
Feb 19, 2016
Explanation:
There are 10 possible ways to assign the attendance taker.
After assigning the attendance taker, there are 9 possible ways to assign the lunch counter.
You can verify that this covers all possible scenarios
So total number of permutations
#10xx9=90#
