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Sagot :
Using the combination formula, it is found that there are 220 ways to decide which countries to skip.
The order in which the countries are skipped is not important, hence the combination formula is used to solve this question.
What is the combination formula?
[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by:
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
In this problem, 3 countries are skipped from a set of 12, hence the number of ways is given by:
[tex]C_{12,3} = \frac{12!}{3!9!} = 220[/tex]
More can be learned about the combination formula at https://brainly.com/question/25821700
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