Respuesta :
The answer is equivalent to 10*9*8 as their is one less student to go after each presentation.
720 ways.
720 ways.
Answer:
The number of ways this can be done is:
720
Step-by-step explanation:
Total number of students are: 10
Now out of these 10 students we are asked to select 3 students.
We know that when we have to choose r items and also the order matters out of a total of 10 items the number of ways of doing so is calculated by the method of per as:
[tex]n_C_r=\dfrac{n!}{(n-r)!}[/tex]
Here we have:
n=10 and r=3
Hence, the number of ways of doing so is calculated as:
[tex]{10}_C_3=\dfrac{10!}{(10-3)!}\\\\\\{10}_C_3=\dfrac{10!}{7!}\\\\\\{10}_C_3=\dfrac{10\times 9\times 8\times 7!}{7!}\\\\\\{10}_C_3=10\times 9\times 8\\\\{10}_C_3=720[/tex]
Hence, the answer is:
720
