Using the permutation formula, it is found that the people can be chosen for the roles in 6840 ways.
The order in which the people are chosen is important, as there are different roles, hence the <em>permutation formula</em> is used.
<h3>What is the permutation formula?</h3>
The number of possible permutations of <u>x elements from a set of n elements</u> is given by:

In this problem, 3 people will be chosen from a set of 20 people, hence the number of ways is given by:

More can be learned about the permutation formula at brainly.com/question/25925367
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Answer:
One and two
Step-by-step explanation:
The answer is one and two since you would first multipy anyway using pemdas
Answer:
D) f(x) = 6x
Step-by-step explanation:
Answer:
By sum interior angle of triangle is equal to third exterior angle hence
z = x + y
No find x and y
Sum triangle is 180 degree