Question

in how many ways can a supermarket chain select 3 out of 12 possible sites for construction of a new supermarket?

Answer 1

Answer:

its 220

Step-by-step explanation:

Answer 2

There are 220 ways supermarket chains can select 3 out of 12 possible sites for the construction of a new supermarket.

What are permutation and combination?

A permutation is the number of different ways a set can be organized; order matters in permutations, but not in combinations.

We have:

Supermarket chains select 3 out of 12 possible sites for the construction of a new supermarket.

As we know,

$\rm C(n, r) =\dfrac{n!}{( r! (n - r)! )}$

n = 12

r = 3

$\rm C(12, 3) =\dfrac{12!}{( 3! (12 - 3)! )}$

C(12, 3) = 220

Thus, there are 220 ways supermarket chains can select 3 out of 12 possible sites for the construction of a new supermarket.

Learn more about permutation and combination here:

https://brainly.com/question/2295036

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