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maxonik [38]
3 years ago
12

Venn diagram question really

Mathematics
1 answer:
-BARSIC- [3]3 years ago
8 0
Hello!

1.
You have to add all the numbers up in the venn diagram to get how many people participated

18 + 11 + 24 + 8 + 7 + 1 + 17 = 86

The answer is 86 people
------------------------------------------------------------------------------------------------------
2.
To find how many people like country you add all the numbers in the country circle

8 + 7 + 1 + 17 = 33

The answer is 33 people
------------------------------------------------------------------------------------------------------
3.
To find how many people likes only country music you look at the number that is only in the country circle

The answer is 17 people
------------------------------------------------------------------------------------------------------
4.
To find how many people like rap and country you add the numbers that are in both of the circles

1 + 7 = 8

The answer is 8 people
------------------------------------------------------------------------------------------------------
5.
To find the amount of people that liked rap and country but not rock you look at the number in only the rap and country circle

The answer is 1 person
------------------------------------------------------------------------------------------------------
6.
To find how many people liked rock or rap you add all the numbers in those circles

18 + 7 + 11 + 24 = 60

The answer is 60 people
------------------------------------------------------------------------------------------------------
Hope this helps!
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antiseptic1488 [7]

Answer:

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Option D

Step-by-step explanation:

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a+(n-1)d=a+(n-1-1)d+7

a+nd-d=a+nd-2d+7

d=7

As the common difference is 7.

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8 0
2 years ago
X + 2y = 5
Dafna11 [192]
B. 2
if any other number was in there i dont think it would work because its neg
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Savatey [412]

For this case we must factor the following expression:

x ^ 2-7x-10

To factor, we must find two numbers that when added together give -7 and when multiplied by -10.

It is observed that there are not two whole numbers that comply with the aforementioned.

Thus, the following equation applies:

x = \frac {-b \pm\sqrt{b ^ 2-4 (a) (c)}} {2 (a)}

Where:

a = 1\\b = -7\\c = -10

We replace:

x = \frac {- (- 7) \pm \sqrt {(- 7) ^ 2-4 (1) (- 10)}} {2 (1)}\\x = \frac {7 \pm \sqrt {49 + 40}} {2}\\x = \frac {7 \sqrt {89}} {2}

So, the roots are:

x_ {1} =\frac {7+ \sqrt {89}} {2}\\x_ {2} =\frac {7- \sqrt {89}} {2}

Answer:

x_ {1} =\frac {7+ \sqrt {89}} {2}\\x_ {2} =\frac {7- \sqrt {89}} {2}

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This is a binomial distribution.
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P(x ≤ 19) =1 - P(x = 20) = 1- 20C20 x (0.71)^(20 - 20) x (0.29)^20 = 1 - 0.29^20 = 1 - 0 = 1
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shepuryov [24]

Answer:

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