Asked by Jana
In how many ways can a school president, a vice-president, and secretary be chosen from 21 students?
I'm not sure to find this answer since there is no order in which they are chosen.
I'm not sure to find this answer since there is no order in which they are chosen.
Answers
Answered by
Steve
the order does not matter. There are 21P3 ways to select an ordered group of 3 items from 21.
Whoever is chosen first, there are 21 available people.
20 for the 2nd, and 19 for the 3rd.
Whoever is chosen first, there are 21 available people.
20 for the 2nd, and 19 for the 3rd.
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