Calculate the number of ways in which four paintings can be awarded first, second, third, and fourth prizes at an art competition in which a total of 30 paintings are displayed

657720 ways

Step-by-step explanation:

This is the number pf permutations of 4 from 30:-

=  30! / (30 - 4)!

= 30! / 26!

= 30*29*28*27

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