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how many ways can you write two different letters, so that they are in alphabetical order? for example, am and iq count, but om does not.

Sagot :

There are 325 ways we can write two different letters so that they are in alphabetical order.

A combination in mathematics is a choice made from a group of separate elements where the order of the selection is irrelevant (unlike permutations).

A k-combination of a set S is officially defined as a subset of S's k unique elements.

We have 25 ways to have the combo A_

Then 24 ways to have the combo  B_

The number of combos = 25 * (26/ 2)  

                                       = 25 * 13  

                                       = 325  ways

To learn more about alphabetical order here:

https://brainly.com/question/25812360

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