The number of different main items that are there is given as 73730.
The number of condiments is given as 13
The number of possible combinations that we would have would be 2¹³
9 of the main items can come with the possible combination of 13 and one of the items can come in two varieties.
This can be written mathematically as
9¹ x 2¹³ + 2
= 73730
Hence we can conclude that the the number of different main items that are there is 73730
This is the concept in mathematics that is used to talk about the possible number of ways that can be used to arrange a collection of items.
Read more on combinations here:
https://brainly.com/question/11732255
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