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# Please help with algebra 2?

1.

Evaluate C(6,2)

a. 30

b. 15

c. 12

d. 36

2.

Evaluage P(7,2)

a. 49

b. 21

c. 42

d. 14

### 2 Answers

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- 8 years agoFavorite Answer
1. The combination formula is nCk = n! / [(n − k)! k!]

Plugging in the numbers and doing the work, the answer will turn out to be b: 15.

2. The permutation formula is nPk = n! / (n - k)!

Plugging in the numbers and doing the work, the answer will turn out to be c: 42.

Source(s): Basically, n is the x coordinate, and k is the y coordinate. - Jeris GLv 68 years ago
1)

6 * 5 / 2 = 15

Answer: b

2)

P(7,2)

7! / (7! - 2!)

5040 / (5!)

5040 / 120

42

Answer: c

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