Question

Please help me I need to turn in tomorrow

Answer 1

Answer: B. 5

Explanation:

Combination

It's a selection of items from a collection, such that the order of selection does not matter.

It can be calculated by using factorials with the formula:

`\displaystyle _mC_n=(m!)/((m-n)!\ n!)`

Let's calculate:

`\displaystyle _5C_1=(5!)/((5-1)!\ 1!)`

`\displaystyle _5C_1=(5!)/((4)!\ 1!)`

Since 5!=5*4! and 1!=1:

`\displaystyle _5C_1=(5*4!)/((4)!\ 1!)`

Simplifying:

`\displaystyle _5C_1=(5)/(1)=5`

Answer: B. 5