Ten elementary school students are eligible to be appointed to two positions: attendance taker ad lunch counter. How many unique arrangement of these two position are possible?

Question

kropot72 · Answer

There are 10 choices for the first of the two positions. Having selected one student for the first position, there are 9 choices for the second position. Each of the 10 choices for the first position can be taken with each of the 9 choices for the second positions. Therefore the number of unique arrangements of the two positions is given by:
$$\large 10\times9=?$$

anonymous · Answer

90 is the wrong answer I don't know how,

kropot72 · Answer

The correct answer for the question that you posted is definitely 90. What is supposed to be the answer?

anonymous · Answer

I been getting 90 but I be getting it wrong. (Apex)