That is permuations
that would be 10! or 10*9*8*7*6*5*4*3*2*1=3628800 ways
2.78 that will be the awnser if you go gor it
Answer:
umm here..i don't know if it's right but there....you can download mathpapa and goodluck

- the current possible number of plates
after adding 2 letters into the 1st set:

after adding 2 letters into the 2nd set:

after adding 2 letters into the 3rd set:

after adding 1 letter into the 1st set and 1 into the 2nd set:
after adding 1 letter into the 1st set and 1 into the 3rd set:
after adding 1 letter into the 2nd set and 1 into the 3rd set:
<span>The largest possible number of plates after adding two numbers is 100.
So, </span><span>the largest possible number of additional plates is 100-60=
40</span>