1. Which formula represents the combination of n taken r at a time? A. C(n,r) =: n! C. C(n,r) = ! (n-r)! n! B. C(n, r) = D. C(n,r) = n! (n-r)!r! 2. What is C(n, n)? A. 1 В. 2 С. 3 D. 4

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter2: Equations And Inequalities
Section2.1: Equations
Problem 76E
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1. Which formula represents the combination of n taken r at a time?
n!
A. C(n,r) =-
C. C(n,r) =
(n-r)!
n!
B. C(n,r) = :
(n-r)!r!
r!
D. C(n,r) = n!
2. What is C(n, n)?
A. 1
В. 2
С. 3
D. 4
Transcribed Image Text:1. Which formula represents the combination of n taken r at a time? n! A. C(n,r) =- C. C(n,r) = (n-r)! n! B. C(n,r) = : (n-r)!r! r! D. C(n,r) = n! 2. What is C(n, n)? A. 1 В. 2 С. 3 D. 4
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