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2 years ago

Ollow the steps below to find the mean for the set of data. Use the work shown to help you.

Mathematics

2 answers:

Elza [17]2 years ago

7 0

Answer:

Step-by-step explanation:

63/9 = 7

Tom [10]2 years ago

6 0

Answer:

Step-by-step explanation:

To find the mean, add up all the values, then divide by the number of values.

1. Add the values

6 + 5 + 8 + 5 + 9 + 6 + 7 + 5 + 12 = 63

2.Divide by the number of values

9 values

63/9

The mean of the data set is 7

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A) what is the probability that the first contestant is a boy?

tamaranim1 [39]

Probabilities are used to determine the chances of an event.

The probability that the first contestant is a boy is 1/2
The probability that the second contestant is a boy, if the first is a boy is 9/19
The probabilities are not independent

The given parameters are:

$\mathbf{Contestants= 20}$

$\mathbf{Girls= 10}$

$\mathbf{Boys = 10}$

(a) Probability that first contestant is a boy

This is calculated as:

$\mathbf{P(Boy) = \frac{Boys}{Contestants}}$

This gives

$\mathbf{P(Boy) = \frac{10}{20}}$

$\mathbf{P(Boy) = \frac{1}{2}}$

(b) Probability that the second contestant is a boy, if the first is a boy

This is calculated as:

$\mathbf{P(Boy) = \frac{Boys - 1}{Contestants - 1}}$

We subtracted 1, because the first contestant (a boy) is no longer part of the selection.

So, we have:

$\mathbf{P(Boy) = \frac{10-1}{20-1}}$

$\mathbf{P(Boy) = \frac{9}{19}}$

(c) Independent probabilities

The probabilities are not independent, because when a contestant is selected, the number of contestant is reduced by 1.

And this will affect the probability of the next selection.

Read more about probabilities at:

brainly.com/question/11234923

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2 years ago

Another name for Spherical Geometry is

Minchanka [31]

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3 years ago

Kara is using a collection of old buttons for a craft project.She sorts the buttons by their sizes.The line plot shows the resul

MariettaO [177]

.25*3=.75
.375*2=.75
.5*2=2.0
.625*2=1.25
.75*3=2.25
.875*2=1.75
1*2=2
1.25*2=2.5
1.5*2=3
1.5+2=3.5
1.25+2.25=3.5+3.5=7
3.5+1.75=5.25
5.25+4.5=9.75
9.75+3=12.75

answer = 12.75in^2

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3 years ago

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Maros runs one mile in 7.5 minutes.If he spends a total of 30 minutes running at the same pace, how many miles will he complete?

andrey2020 [161]

Answer:

4 miles

Step-by-step explanation:

30/7.5 = 4

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2 years ago

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