So, to evaluate a combination, there's a formula we use.
I don't remember the formula from the top of my head, lol, but this is how you solve them.
7 c 2
When doing combinations and permutations each number is always in a factorial. We always start with the number on the left.
7! That's the total amount. The number on the left divides into that.
7! / 2!
We're not done yet. Here's the tricky part. We also always divide the number on the left, in this case 7!, with the positive difference of both numbers given to us.
7 - 2 = 5
So, we have 7! / 5! / 2! = 21.
Hope that helped!
Let's work another one.
5 c 3
We have 5! / 3! ,but we need to also divide 5! by the positive difference of 5 and 3. We get 2.
So, 5! / 3! / 2! = 10.
If you have any questions then leave a comment. Good luck!
Answer:
43:24
Step-by-step explanation:
1. Keep 43 passengers in mind
2. To find how many women you would take 43 passengers minus 19 Arman
3. You should get 24, that's how many women
4. Set up your ratio: 43:24, 43/24 Any could work
Answer:
Step-by-step explanation:
EF = CD
FC = DE These equal lines are properties of a parallelogram.
2y = 3y - 17 Add 17 to both sides
2y + 17 = 3y Subtract 2y from both sides.
2y-2y+17 =3y-2y
y = 17
CD = y + 43
CD = 17+43
CD = 60
Since CD = 60 then FE = 60
2.5% / 100 = 0.025
0.025 * 2.21 = 0.05525
Answer: I think its 15 but if you could give me answer choices it would be better
But The answer is 15.
Step-by-step explanation: