in how many ways can a supermarket chain select 3 out of 12 possible sites for construction of a new supermarket?
1 answer:
You might be interested in
Answer:
549
Step-by-step explanation:
A calculator can give you an equivalent expression.
I might work from the middle outward:
= 486 -3 +33×2
= 483 +66
= (480 +60) + (3 +6)
= 540 + 9
= 549
