Question

You have to answer 2 essay questions for an exam. There are 7 essays to choose from. How many different groups of 2 essays could you possibly choose?

Answer 1

21

Explanation:

As there are 7 essays to choose from and we need to choose 2 essays.

So , groups of 2 essays to choose from =
`7_{C_(2) }`

=
`((7)(6))/(2)`

= 21