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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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pantera1 [17]

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Step-by-step explanation:

the formula for circumference of a circle is 2 x pi x r(radius).

6 0
2 years ago
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ivanzaharov [21]

Answer:

Step-by-step explanation:

This is the associative property for addition. In informal language, it says under addition, the order of the addition is not critical.

8 0
2 years ago
Is there a rational number between 1/7 and 1/8
telo118 [61]
1/7 = 2/14 =  <span> <span> <span> 0.1428571429 </span> </span> </span>
1/8 = 2/16 =  0.125
2/15 = <span> <span> <span> 0.1333333333 </span> </span> </span>
So, 2/15 is between 1/7 and 1/8
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5 0
3 years ago
Which of the following question is not considered a statistical question?
vekshin1

Answer:

B. How many total customers were at the story today?

Step-by-step explanation:

Option 'B' is not a statistical question because there is not more than one answer.

There is only one answer to this question.

Option 'A,' 'C,' and 'D' are statistical questions because there is more than one answer.

<em>What amounts did each person at the store spend on their purchase?</em>

This question has more than one answer.

<em>How long did each customer spend shopping at the store?</em>

<em>What are the heights of each customer who entered the store?</em>

These questions have more than one answer as well.

Statistical questions are questions that have more than one answer. This means you can collect data.

I, therefore, believe that option 'B' is not a statistical question.

7 0
2 years ago
essica was asked to hang six student paintings in a row on the wall. How many different ways could she arrange them?
andriy [413]
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Number of different places for each painting = 6
Total number of ways she could hang all the painting = 6 × 6 = 36
3 0
2 years ago
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