SOLUTION: 1. P(4,4) 2. C(4,4) 3. 5! 4. C(7,4) 5. P^c(5,5) 6. 3!+0/2!*1! can you please help me with these problems on # 1. i got 24 and on # 2 i got 120 but the others i can't f

Algebra ->  Permutations -> SOLUTION: 1. P(4,4) 2. C(4,4) 3. 5! 4. C(7,4) 5. P^c(5,5) 6. 3!+0/2!*1! can you please help me with these problems on # 1. i got 24 and on # 2 i got 120 but the others i can't f      Log On


   

Question 446363: 1. P(4,4)
2. C(4,4)
3. 5!
4. C(7,4)
5. P^c(5,5)
6. 3!+0/2!*1!
can you please help me with these problems
on # 1. i got 24
and on # 2 i got 120
but the others i can't figure out
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

C(n,x) = n%21%2F%28x%21%28n-x%29%21%29 and P(n,x) = n%21%2F%28n-x%29%21%29

1. P(4,4) = 24

2. C(4,4) = 4!/4!0! = 1   Note: 0! = 1

3. 5! = 5*4*3*2*1 = 120

4. C(7,4)= 7!/4!3! = 7*6*5*3*2/4*3*2*3*2 = 7*5 = 35

5. P^C(5,5)  C(5,5) = 1  P^1 = P 

6. 3!+ 0/2!*1! = 3! = 6