Question

How many different ways can a president and vice president be selected from a class of 22?

Answer 1

The answer is D22,2=22*21=462

Answer 2

Answer: 462

Step-by-step explanation:

Given: The total number of students in a class = 22

Then to select a president and vice president from the class, we need to use Permutations such that the number of different ways can a president and vice president be selected from a class of 22 is given by :-

$^{22}P_2=\frac{22!}{(22-2)!}=\frac{22\times21\times20!}{20!}=21\times22=462$