15% of the students in Mrs. Madison’s math classes have an ‘A’. If 18 students have an ‘A’, how many students are in Mrs. Madiso
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Answer:
<h2>There are 3,921,225 ways to select the winners.</h2>Step-by-step explanation:
This problem is about combinations with no repetitions, because the same person can't win four times. It's a combinaction because the order of winning doesn't really matter.
Combinations without repetitions are defined as
Where and
.
Replacing values, we have
Therefore, there are 3,921,225 ways to select the winners.
Additionally, as you can imagine, the probability of winning is extremely low, it would be 3,921,225 to 1.