chafelimadiepe2nger chafelimadiepe2nger
  • 25-11-2016
  • Mathematics
contestada

nCr/nPr=r!

give proof.

Respuesta :

Аноним Аноним
  • 27-11-2016
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!
Answer Link

Otras preguntas

4t + 2u2 - u3 ; t=2 u=1 ( I can't input exponents; the second '2' in 2u2 is an exponent, and the '3' in u3 is, too.)
Evaluate the expression when x = 8 and y = 1. x/2y
should the federal government be allowed to use credit? why or why not
How many U.S. states are named after a president?
Chet's father is five times as old as Chet. In six years, his father only be three times as old. How old is Chet now?
In what times of year are tropical cyclones most likely to form? A. Fall and winter B. Summer and fall C. Spring and summer D. Winter and spring
0.39 is 15% of what number
A(n) ____________ is any long speech a character delivers to other listening characters. -Dialogue - Aside - Monologue - Soliloquy
Choose the system to which this item belongs: hemoglobin excretory circulatory endocrine digestive respiratory
Which function has a minimum and is transformed to the right and down from the parent function, f(x) = x2? g(x) = –9(x2 + 2x + 1) – 7 g(x) = 4(x2 – 6x + 9) + 1