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goblinko [34]
3 years ago
5

your teacher divides the class into groups of 5 for an activity. How many possibilities are there for the group that contains yo

u if there are 25 students in the class in all?(Hint:How many remain to be chosen)
Mathematics
1 answer:
Luda [366]3 years ago
4 0
It would be 5/25 or 1/5.
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__

<em>Additional comments</em>

This sort of selection (2 out of 25) has a formula for it, and an abbreviation for the formula.

 "n choose k" can be written nCk or C(n, k)

The function is a ratio of factorials:

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If you can typeset this, it is written ...

  \displaystyle\binom{n}{k}=\frac{n!}{k!\cdot(n-k)!}

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