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brilliants [131]
4 years ago
10

The candy machine in the bookstore has five rows to choose from with six items in each row. Currently, there are seven items tha

t are sold out. If Ari randomly pushed a button, what is the probability he will select an item that is already sold out?
Mathematics
1 answer:
Gekata [30.6K]4 years ago
6 0

Answer:

23.3%

Step-by-step explanation:

so 5 by 6 is 30

so to find the fraction or desimal or persent u need to put 7/30

and that would be .23 reapeating then time it by 100 to get

23.3% ps the 3 is reapeating

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Suppose that you were not given the sample mean and sample standard deviation and instead you were given a list of data for the
Troyanec [42]

Answer:

So, the sample mean is 31.3.

So, the sample standard deviation is 6.98.

Step-by-step explanation:

We have a list of data for the speeds (in miles per hour) of the 20 vehicles. So, N=20.

We calculate the sample mean :

\mu=\frac{19 +19 +22 +24 +25 +27 +28+ 37 +35 +30+ 37+ 36+ 39+ 40+ 43+ 30+ 31+ 36+ 33+ 35}{20}\\\\\mu=\frac{626}{20}\\\\\mu=31.3

So, the sample mean is 31.3.

We use the formula for a sample standard deviation:

\sigma=\sqrt{\frac{1}{N-1}\sum_{i=1}^{N}(x_i-\mu)^2}

Now, we calculate the sum

\sum_{i=1}^{20}(x_i-31.3)^2=(19-31.3)^2+(19-31.3)^2+(22-31.3)^2+(24-31.3)^2+(25-31.3)^2+(27-31.3)^2+(28-31.3)^2+(37-31.3)^2+(35-31.3)^2+(30-31.3)^2+(37-31.3)^2+(36-31.3)^2+(39-31.3)^2+(40-31.3)^2+(43-31.3)^2+(30-31.3)^2+(31-31.3)^2+(36-31.3)^2+(33-31.3)^2+(35-31.3)^2\\\\\sum_{i=1}^{20}(x_i-31.3})^2=926.2\\

Therefore, we get

\sigma=\sqrt{\frac{1}{N-1}\sum_{i=1}^{N}(x_i-\mu)^2}\\\\\sigma=\sqrt{\frac{1}{19}\cdot926.2}\\\\\sigma=6.98

So, the sample standard deviation is 6.98.

3 0
3 years ago
5 pounds of apples costs $7.45 . what is the dependent and the independent variables
Vlada [557]

$7.45

+

5pounds

13.74065 US$

5 0
4 years ago
the cost of a personal pizza is $4. a drink cost $1. Anna wrote the equation y=4x + 1 to represent the relationship between tota
valentinak56 [21]
The correct answer should be y=4x + 1d where x equals the number of personal pizzas, and d equals the number of drinks.

She didn't account for the number of drinks ordered for more than one meal.
3 0
3 years ago
Read 2 more answers
A local maximum of the function f(x) occurs for which x-value?
My name is Ann [436]

Answer:

-4

Step-by-step explanation:

the highest f(x) value on the table is at -4 on the x column

3 0
3 years ago
Trapezoid RSTU with vertices R(-5, 15), S(0, 10), T(-5, 5) and U(-15, 5): scale factor = 1/5, centered at the origin
Vlada [557]

Answer:

34

Step-by-step explanation:

6 0
3 years ago
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