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Dima020 [189]
2 years ago
13

A professor has learned that three students in his class of 20 will cheat on the final exam. He decides to focus his attention o

n four randomly chosen students during the exam. What is the probability that he finds at least one of the students cheating
Mathematics
1 answer:
miss Akunina [59]2 years ago
4 0

Answer:

6%

Step-by-step explanation:

3/20=4/x

It is a indirect proportion so we reciprocal,

Then,

3/20=x/40

3×40=20×x

120=20x

x=120/20

x=6

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maks197457 [2]
Good evening.


This is a incomplete quadratic equation, because it does not have the term bx. Therefore, we can solve this faster with the following strategy:

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4 0
3 years ago
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timofeeve [1]
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