Using the combination formula, it is found that the number of ways to choose the presenters is given by:
C. 462.
The order in which the presents are chosen is not important, hence the <em>combination formula</em> is used to solve this question.
<h3>What is the combination formula?</h3>
is the number of different combinations of x objects from a set of n elements, given by:

In this problem, 6 students are chosen from a set of 11, hence the number of ways is given by:

More can be learned about the combination formula at brainly.com/question/25821700
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Answer:
18
Step-by-step explanation:
18/24 is a 1/2 reduction from 36/48.
3/4 is simplest form.
Multiply 400 times 0.70 and that’s how you get the % (in this case 280)
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