1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
777dan777 [17]
3 years ago
14

NCr/nPr=r! give proof.

Mathematics
1 answer:
Sergio [31]3 years ago
3 0
<span>It's 1/r! 

nCr = n! / r!(n-r)! 
nPr = n! / (n-r)! 

If you divide the two you'd have: 

n! / r! (n-r)! * (n-r)! / n! = 1/r!

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
</span>
You might be interested in
Do these look right?
bezimeni [28]

Answer:

yes it look right like the one you have to do 2x+5=39

5 0
3 years ago
(-3)(8+-10)!!!!!!!!!!!!!!!!!!!!!
evablogger [386]
(-3)(8+-10)
(-3) • ( -2)
which equals 6
8 0
3 years ago
The operating costs for each machine for one day have an unknown distribution with mean 1610 and standard deviation 136 dollars.
BabaBlast [244]

Answer:

20.27

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

Using the Central Limit Theorem for Means, what is the standard deviation for the sample mean distribution?

This is s when \sigma = 136, n = 45. So

s = \frac{136}{\sqrt{45}} = 20.27

So the correct answer is:

20.27

3 0
3 years ago
This table displays the height of water as a pool is being filled. A 2-column table with 4 rows. Column 1 is labeled Time (minut
Law Incorporation [45]

Answer:1. 0.35. 0.35

Step-by-step explanation:

I did the question on edgenuity

6 0
3 years ago
Rearrange to make x the subject<br> 4(x-3)/a=y
klio [65]

Answer:

Answer: x = a*y + 3

Step-by-step explanation:

To make x the subject of the equation, first, we open the bracket

4x - 12/a = y

Then cross multiply:

4x - 12 = a * y ( a*y means the product of the two variables)

Add 12 to both sides of the equation

4x = a*y + 12

Divide both sides by 4 to get the value of x

x = a * y + 12/4

x = a*y + 3

3 0
3 years ago
Other questions:
  • The schematic of a rectangular patio is drawn 1/4 inch to 1 feet. if the patio is 18 feet long, what is the measure of the patio
    11·1 answer
  • Write the expression in simplest form using only positive exponents (x^2/3y^-1/2)^-6
    12·1 answer
  • Will has 24 t-shirts; 1/4 are yellow and 1/3 are white. How many t-shirts are not white neither yellow
    10·1 answer
  • There are 19 identical socks. How many pairs of socks are there? Will there be any socks without a match? If so, how many?
    10·2 answers
  • Brian earns $11 per hour how many hours will Brian have to work until your earns $143? Plssss help me​
    9·1 answer
  • How to find the area of a regular polygon with only the apothem ?
    7·2 answers
  • Finding what percent one number is of another ?
    11·1 answer
  • What is the area of a circle with the radius of 7
    9·1 answer
  • Use logarithm tables to evaluate<br>the following<br> 723.7 X 0.0667​
    13·1 answer
  • Examine the following three premises: i. All kids who have a smartphone play mobile legends.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!