Answer:
3003
Step-by-step explanation:
The number of differents menus containing 10 main courses that the restaurant can make if it has 15 main courses from which to chose is calculated through the combination: 15C10. The formula of the combination is: nCr = n! / ((r!) x(n - r)!)
Where r=10 and n=15
Substituting the values to the equation: 15C10 = 15! / (10!)x(10 - 5)! = 3003
Then there are 3003 different menus that a restaurant can makeif it has 15 main courses from which to choose.
Answer:
19 1/2
Step-by-step explanation:
I was doing this half a decade ago, so I'm pretty sure it's right
Answer:7 familes
21 divided by 3=7
Step-by-step explanation:
Answer:
Step-by-step explanation:
Four consecutive counting numbers would look like this
x
x + 1
x + 2
x + 3
Do you see that these numbers are 1 larger than the one before it. So if x is 20 the numbers would be 20 21 22 23
Now take the 4 general numbers and add them
x + x + 1 + x+2 + x + 3
4x + 6
Two will go into 4x to give 4x/2 = 2x
Two will go into 6 to give 6/2 = 3
Always happens. There are no exceptions. Try x = 20 again
20 + 21 + 22 + 23 = 86
Can this number be divided by 2? Yes it can 86/2 = 43
Now, divide both sides by 60 to isolate the variable x.
= 60x/60 = 1500/60.
x = 25.
<span>answer is </span><span>25%</span>