Question 1173648
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<pre>

In 12*11*10 = 1320 ways.
</pre>

Such problems were solved and explained several times last week.


See, for example, this link


<A HREF=https://www.algebra.com/algebra/homework/Permutations/Permutations.faq.question.1173261.html>https://www.algebra.com/algebra/homework/Permutations/Permutations.faq.question.1173261.html</A>


https://www.algebra.com/algebra/homework/Permutations/Permutations.faq.question.1173261.html