The teacher ordered the students in 24 ways.
We have given that the total number of students is 4.
4 students are assigned to give presentations.
We have to find the arrangement of the 4 students.
An arrangement (or ordering) of a set of objects is called a permutation. (We can also arrange just part of the set of objects.)
In a permutation, the order that we arrange the objects n is important.
4 students can be arranged by 4! ways.
[tex]4!=4*3*2*1\\ =12*2\\=24[/tex]
Therefore option 3 is correct.
The teacher ordered the students in 24 ways.
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