contestada

There are 12 students in a social studies class. three students will be selected to present their term projects today. in how many different orders can three students be selected? 1,320 220 504 36

Respuesta :

asadullahgiki
As, If the order is important then we use permutation;

total no. of students= 12
selected students= 3

12P3= 12!/(12-3)!=1320

The correct answer is:


1320.


Explanation:


This is a permutation of n objects taken r at a time.


In this case, n is 12 and r is 3.


The formula is:

[tex] P_r^n=\frac{n!}{(n-r)!}
\\
\\=P_3^{12}=\frac{12!}{(12-3)!}
\\
\\=\frac{12!}{9!} = 1320 [/tex]

ACCESS MORE
ACCESS MORE
ACCESS MORE
ACCESS MORE

Otras preguntas