Question 1166298
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Wishes are fulfilled; orders are filled....<br>
You need to use 4*5=20 of the 200 different tiles.
You have 200 choices for the first tile on the first tray.
You have 199 choices for the second tile on the first tray.
You have 198 choices for the third tile on the first tray.
...
You have 181 choices for the fifth tile on the fourth tray.<br>
The total number of ways you can make the 4 trays is<br>
P(200,20) = 200*199*198*...*2*1<br>
If you need to evaluate that number, use a calculator....<br>