Question

Directions: Choose the letter of the correct answer and write it on the space provided. 1. Which of the following represents the permutation of n objects taken r at a time when repetition is NOT allowed? a. $P = \frac{n!}{p!q!r!}$ b. $P(n, r) = \frac{n!}{(n-r)!}$ c. $P(n, n) = n!$ d. $P(n, n) = n!$

          Directions: Choose the letter of the correct answer and write it on the space provided.
1. Which of the following represents the permutation of n objects taken r at a time
when repetition is NOT allowed?
a. $P = \frac{n!}{p!q!r!}$ 
b. $P(n, r) = \frac{n!}{(n-r)!}$ 
c. $P(n, n) = n!$ 
d. $P(n, n) = n!$

Directions: Choose the letter of the correct answer and write it on the space provided.
1. Which of the following represents the permutation of n objects taken r at a time
when repetition is NOT allowed?
a. P = (n!)/(p!q!r!)
b. P(n, r) = (n!)/((n-r)!)
c. P(n, n) = n!
d. P(n, n) = n!

Added by Kelsey B.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Kirsty Gledhill

Step 1

So, for the first object, we have n choices. For the second object, we have n-1 choices (since we cannot choose the same object again). For the third object, we have n-2 choices, and so on, until we have chosen r objects. Show more…

Show all steps

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Directions: Choose the letter of the correct answer and write it in the space provided. Which of the following represents the permutation of n objects taken at a time when repetition is NOT allowed? a. P = n! b. P(n, r) c. P(n, n) = n! d. P(n, n) = n! / (n - r)!