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Lena [83]
3 years ago
7

PLEASE ANSWER RIGHT AWAY

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
8 0

Answer:

A- control group

Since group A is tested under normal condition, it is the control group. Control group is separated from other groups so that the independent variable being tested cannot influence the result.

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Find the probability of a least one birthday match among a group of 44 people.
Cerrena [4.2K]

Answer:

0.1137= 11.37%

Step-by-step explanation:

Assuming there are 365 days in one year and every people have 1 birthday, then the chance for two people to have the same birthday is 1/365 and the chance they are not is 364/365. We are asked the chance for at least one match among 44 people. The opposite of the condition is that we have 0 matches and easier to calculate. The calculation will be:

P(X>=1)= ~P(X=0) = 1

P(X>=1)=- P(X=0)

P(X>=1)=1 - (364/365)^44

P(X>=1)=1- 0.8862

P(X>=1)=11.37%

3 0
3 years ago
Verona is solving the equation –3 + 4x = 9. In order to isolate the variable term using the subtraction property of equality, wh
frutty [35]

Answer:

subtract  -3

Step-by-step explanation:

–3 + 4x = 9

Add 3 to each side

This is the same as subtracting -3

-3 + 4x - (-3) = 9 - (-3)

4x = 9 +3

4x = 12

8 0
3 years ago
Read 2 more answers
Parameter or statistic??
Mandarinka [93]
The answer is b hope this helps
6 0
3 years ago
Brainlist thingy and 20
Flauer [41]

Answer:

Nolan takes 100s

Step-by-step explanation:

x = x - 15x/100

x = 0.85x

x = 85/0.85

x = 100s

7 0
3 years ago
Read 2 more answers
Question 11 the length of a rectangle is six times its width. if the perimeter of the rectangle is 98 m , find its area.
andrezito [222]
Let's look at the formula to solve the perimeter.
2l+2w=98
We know that l=6w
Let's put that into the equation.
2(6w)+2w=98
12w+2w=98
14w=98
98÷14=7
So the width is 7. Let's find the length.
Since the length is six times the width: 7×6= 42
So, the length is 42 while the width is 7. We need to find the area.
42×7=294
The area is 294 m².
Tell me if this helps!!
4 0
3 years ago
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