Desks

A class has 20 students. The classroom consists of 20 desks, with 4 desks in each of 5 different rows. Amy, Bob, Chloe, and David are all friends, and would like to sit in the same row. How many possible seating arrangements are there such that Amy, Bob, Chloe, and David are all in the same row?

Result

n =  120

Solution:

Solution in text n =

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To solve this example are needed these knowledge from mathematics:

Would you like to compute count of combinations? See also our variations calculator. See also our permutations calculator.

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