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k0ka [10]
3 years ago
5

Probabilities where the focus is on just one group of objects and a random sample is taken from that group alone are called​ wha

t?
Mathematics
1 answer:
JulsSmile [24]3 years ago
7 0
I think the answer would be conditional probability. It is a type of probability that the focus is on a certain group and taking a sample from it randomly. It is the probability of a certain event basing on the occurrence of an event that happens previously.<span />
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Suppose you did a survey of male shoes size and the mean of that survey was size 10 with a standard deviation of 1.5. What is th
astra-53 [7]
Given:
Population mean,  μ = 10
Population standard deviation, σ = 1.5
Random variable, x = 11.

By definition, the z-score is
z = (x - μ)/σ
   = (11 - 10)/1.5
   = 0.667

Answer: 0.667
4 0
3 years ago
17. A hemisphere of lead of radius 7 cm is cast into a right circular cone of height 49 cm. Find
Pavlova-9 [17]

Answer:

r = 3.74cm

Step-by-step explanation:

Given

Hemisphere

Radius = 7cm

Cone

Height = 49m

Required

Determine the radius of the cone

First, we calculate the volume (V1) of the hemisphere.

V_1 = \frac{2}{3}\pi r^3

Substitute 7 for r

V_1 = \frac{2}{3}\pi * 7^3

V_1 = \frac{2}{3}\pi * 343

V_1 = \frac{686}{3}\pi

Volume (V2) of a cone is:

V_2 = \frac{1}{3}\pi r^2h

Because the lead is cast into a cone, then they have the same volume.

So, we have:

\frac{686}{3}\pi = \frac{1}{3}\pi r^2h

686 =  r^2h

Substitute 49 for h

686 =  r^2 * 49

Divide both sides by 49

r^2 = \frac{686}{49}

r^2 = 14

r = \sqrt{14

r = 3.74cm

<em>Hence, the radius of the cone is 3.74cm</em>

5 0
3 years ago
1 pts<br> Question 6<br> 110°<br> 570<br> What is the value of x?
Allisa [31]

Answer:

X=13

Step-by-step explanation:

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4 0
3 years ago
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25 Pts + Brainliest for the first correct answer.
GuDViN [60]

Answer:

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31) x = 23

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Step-by-step explanation:

29)

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x = 17


30)

4x + 21 + 103 = 180

4x + 124 = 180

4x = 56

x = 14


31)

2x + 23 = 4x - 23

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 x = 23


32)

4x - 42 = 134

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x =  44

6 0
3 years ago
If m &lt;L=m &lt;K and m &lt;J=20 what is the measure of the exterior angle at vertex K
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The angle measurement is 70

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3 years ago
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