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devlian [24]
2 years ago
10

1 Officials estimate the probability that England will host the World Cup in 2018 is 58%. If the estimate is correct, what is th

e probability that England will not host the World Cup?
2 A weather forecast predicts the probability that it will snow the
following day is 23.
What is the probability that it will not snow the following day?


3 There is a 0.7 chance a tennis player will win her next match.
The probability that she will lose her next match is 0.2.
What is the probability the tennis player will draw her next match?

4 At a college, 160 students study Psychology.
120 of the students are female.
What is the probability a Psychology student chosen at random
will be female?

6 A train company calculates that the probability that a train will break down on any one day is 0.012.
On one particular day, the train company has 650 trains running.
How many trains does the train company estimate will break down that day?​
Mathematics
1 answer:
TiliK225 [7]2 years ago
3 0

Answer:

  1. 42%
  2. 1/23
  3. 1.1

4. 3/4

Step-by-step explanation:

  1. 100%_58%=42%
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X+2=2(2x-14) solve for x.
LekaFEV [45]

X =10.


First distribute the 2(2x-14) and get 4x-28.

x+2-4x-28. Subtract x from each side to get 2=3x-28.

Add 28 to both sides to equal 30=3x. Divide each side by 3 to get your final Answer, x=10.

3 0
3 years ago
The ages of the Oscar-winners for best actor and actress for the years 1970 through 1990 are given below: Women: 34, 34,26,37,42
Artemon [7]

Answer:

See explanation below.

Step-by-step explanation:

Numerical way

We can calculate the mean and the standard deviation from a sample with the following formulas:

\bar X = \frac{\sum_{i=1}^n X_i}{n}

s= \frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}

We have the following dataset for women: 34,34,26,37,42,41,35,31,41,33,30,74,33,49,38,61,21,41,26,80,72

And the mean and deviation are:

\bar X_F = 41.857

s_F = 16.399

We can calculate the median ordering the data like this:

21,26,26,30,31,33,33,34,34,35,37,38,41,41,41,42,49,61,72,74,80

And the median would be on the 11 position of the data ordered, for this case is:

median_F = 37

Minimum_F = 21 , Maximum_F = 80

And the range is given by: Range_F = 80-21=59

We can also calculate the coefficient of variation given by:

\hat{CV} =\frac{s}{\bar X} = \frac{16.399}{41.857}=0.392

We have the following dataset for men:

43, 40,48,48,56,38,60,32,40,42,37,76,39,55,45,35,61,33,51,32,42

And the mean and deviation are:

\bar X_M = 45.381

s_M = 11.218

We can calculate the median ordering the data like this:

32, 32,33,35,37,38,39,40,40,42,42,43,45,48,48,51,55,56,60,61,76

And the median would be on the 11 position of the data ordered, for this case is:

median_M = 42

Minimum_M = 32 , Maximum_F = 76

And the range is given by: Range_M = 76-32=44

We can also calculate the coefficient of variation given by:

\hat{CV} =\frac{s}{\bar X} = \frac{11.218}{45.381}=0.247

We se that the mean for the male groups is higher than the mean for female group. The deviation is higher for the female group comapred to the male group. We have more variation for the female group as we can see on the range and the coeffcient of variation.

Graph

We can see the histograms for each group on the figures attached.

As we can see the histogram for males is skewed to the right with the median lower than the mean.

By the other hand the histogram for the female group seems to be skewed to the right also but with missing values on the interval 50-60, for this reason we have more variation compared to the male group.

7 0
3 years ago
Write the equation of a line in point slope form that passes through the points (-8.-3) and (2,2) need help ​
slava [35]
Y+3=1/2•(x+8) (point slope form)
should be correct
7 0
3 years ago
Help me please !!!!!
zysi [14]
Nkoooooooooooooooooooooooo
5 0
3 years ago
Help pleaseeeeeeee thanks
lianna [129]

Answer:

so the answer is 5

Step-by-step explanation:

the equation will be for this is

7x + 20 = 55

7x = 55-22

7x = 35

x = 35÷7

x=5

3 0
2 years ago
Read 2 more answers
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