Question

How many ways can a President and a Vice President (2 positions) be selected from a group of 10 people?

Answer 1

90

Explanation:

There are 10 people who can be picked for the first position, which leaves 9 people who can be picked for the second position.

10 × 9 = 90

You can also use permutations.

₁₀P₂ = 90