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r-ruslan [8.4K]
3 years ago
10

A school for learning foreign languages has 72 students who learn German, and 54 of those students also learn Russian. There are

12 students who do not learn German but learn Russian, and 10 students do not learn either German or Russian. Which table best shows the conditional relative frequency of rows for the data?

Mathematics
2 answers:
eimsori [14]3 years ago
6 0
I believe it the first table hope this helps you.
densk [106]3 years ago
6 0
<h2>Answer with explanation:</h2>

The conditional relative frequency of rows:

It is the relative frequency corresponding to each row.

It is obtained when we divide each entry of each row by it's corresponding row total.

It is given that:

  • A school for learning foreign languages has 72 students who learn German, and 54 of those students also learn Russian.

This means that the sum of the first column i.e. who learn German is: 72

and first entry of first row is: 54

Hence, first entry of second row is: 72-54=18

  • There are 12 students who do not learn German but learn Russian.

This means that the second entry of first row is: 12

  • 10 students do not learn either German or Russian.

This means that the second entry of second row is: 10.

  • Sum of first row is: 54+12=66
  • Sum of the second row is: 18+10=28
  • Total sum is: 66+28=94
  • Sum of the second column is: 10+12=22

          The FIRST TABLE is the answer.

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During the mayoral election,two debates were held between the candidates. The first debate lasted 1 2/3 hours.The second one was
butalik [34]

Answer:

2nd debate was 3 hours long.

Step-by-step explanation:

We have been given that during the mayoral election,two debates were held between the candidates. The first debate lasted 1 2/3 hours. The second one was 1 4/5 times as long as the first one.

Let us find the estimate of time spent on 2nd debate.

1 2/3 hours would be approximately 2 hours. 1 4/5 times would be equal to 2 times.

2*2=4

Therefore, the estimated time is less 4 hours.

To find the time spent on 2nd debate, we will multiply 1 2/3 by 1 4/5.

First of all, we will convert mixed fractions into improper fractions as:

1\frac{2}{3}=\frac{5}{3}

1\frac{4}{5}=\frac{9}{5}

Now, we will multiply both fractions as:

\frac{5}{3}\times \frac{9}{5}

\frac{1}{3}\times \frac{9}{1}

\frac{9}{3}\Rightarrow 3

Therefore, the 2nd debate was 3 hours long.

5 0
3 years ago
X &lt; -4.8
Kamila [148]

Answer:

D & E

Step-by-step explanation:

4 0
3 years ago
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30 points to anyone that can answer correctly in probability.
IrinaVladis [17]

Formula: P(A or B)=P(A)+P(B)-P(A or B)  

p(c)=7/18

p(s)=6/18

p(c or s)=2/18

0.39+0.33-0.11=

answer:0.61

4 0
4 years ago
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Which of the following describes an angle with a vertex at Z?
Tresset [83]
B is the answer and why is bc I took the quiz
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3 years ago
Someone help! It is urgent!!!
djverab [1.8K]

Answer:

a. f(-1)=12

b. f(2t)=16t²-6t+5

c. f(t-2)=4t²-19t+27

Step-by-step explanation:

For a, b, c, we are given an input. We plug that into f(x) to find our answers.

a.  f(-1)=12

f(-1)=4(-1)²-3(-1)+5

f(-1)=4+3+5

f(-1)=12

-------------------------------------------------------------------------------------------------------------

b. f(2t)=16t²-6t+5

f(2t)=4(2t)²-3(2t)+5

f(2t)=4(4t²)-6t+5

f(2t)=16t²-6t+5

-------------------------------------------------------------------------------------------------------------

c. f(t-2)=4t²-19t+27

f(t-2)=4(t-2)²-3(t-2)+5

f(t-2)=4(t²-4t+4)-3t+6+5

f(t-2)=4t²-16t+16-3t+6+5

f(t-2)=4t²-19t+27

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3 years ago
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