There are 6 ways of the sequence of the 2 countries from the combination.
According to the statement
We have to find the possible number of the sequence with the given information.
So, For this purpose, we know that the
From given information:
He has a list of 4 countries and He asks a travel agent to make an itinerary that includes any 2 of the 4 countries.
here to find the sequence we use the combination here
Combination is the number of possible arrangements in a collection of items where the order does not matter.
The formula to calculate combination is
[tex]C_{r} ^{n}[/tex]
According to the information the combination become of 4 and 2.
So,
[tex]C_{2} ^{4} = \frac{4!}{2! * 2!}[/tex]
[tex]C_{2} ^{4} = \frac{4*3*2*1}{2*1 * 2*1}[/tex]
[tex]C_{2} ^{4} = 6[/tex].
There are 6 ways by the combination.
So, There are 6 ways of the sequence of the 2 countries from the combination.
Learn more about Combination here
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