Permutation: In a race of 10 students, find the number of ways students can finish 1st, 2nd, and 3rd. In this case the order matters, so it is a permutation.
10 x 9 x 8 = 720 ways
Combination: In a class of 10 students, find the number of ways a group of 3 students can be selected to win a prize. In this case the order doesn't matter, so it's a combination.
10 x 9 x 8 / (3 x 2 x 1) = 120 ways
$51.36
to add 7% to the pre-price, simply multiply the pre-price by 1.07, do this to automatically get the total. I personally see % as decimals so that helps me figure out where to start.
Add the two numbers in your ratio and divid if from one hundred
This would equal 20
So to find the percentage for the colours as they are time the two ratio number to get 40:60 this is also the percentages.
If you add five more blue parts in to the ratio and leave the red alone you will get 2:8 this would give you a 80% blue part.
So the answer is
5 parts of blue are needed to make the mixture 80% blue.
Answer:
A≈622.04
Step-by-step explanation:
Formula: A=2πrh+2πr²
Answer:
GCD(a,b) is multiple of d. It means d divides GCD(a,b).
Step-by-step explanation:
Let a and b are two unknown numbers.
If d divides a and d divides b, then a and b are multiple of d.
where, m and n are integers.
The greatest common divisor of a and b is
GCD(a,b) is multiple of d. It means d divides GCD(a,b).
Hence proved.