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GREYUIT [131]
4 years ago
8

The beverage orders from school cafeteria are shown in the graph. If 760 students purchase a beveragehow many of the students ch

ose water

Mathematics
1 answer:
kari74 [83]4 years ago
5 0

according to the graph, 25% chose water, and

\bf \begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{25\% of 760}}{\left( \cfrac{25}{100} \right)760}\implies 190

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1. The values, x in a sample of 15 are summarized as follows
Serhud [2]

Answer:

(a) 100

(b) 10.27

Step-by-step explanation:

We are given  

No of elements = 15  

Σ(x-c) = 72,Σ(x-c)^2 = 499.6

,where c is a constant

and the sample mean is 104.8.

(a)  lets take into account Σ(x-c) = 72

this means that we have the sum of the 15 elements of x and each element of x is subtracted by the constant c

so the equation becomes Σxi -15c = 72, ............(1)

where xi means the sum of the elements of x from 1 to 15.

we are given the mean as 104.8

this means that Σxi/15 = 104.8

Σxi = 15*104.8 = 1572 .............(2)

substituting (2) in (1)

we get  

1572 - 15c = 72  

15c = 1500  

c = 100

(b) We will use the property that variance does not change when a constant value is added or subtracted to the elements. This we can observe in the given equation that c is a constant that has the value of 100.

so the variance is  

σ^2 = Σ(x-c)^2/15  - (Σ(x-c)/15 )^2

      = 499.6/15  - (72/15)^2

      = 33.31 - 23.04

   σ^2   = 10.27

Therefore the variance of the given problem is 10.27.

5 0
3 years ago
One common system for computing a grade point average​ (GPA) assigns 4 points to an​ A, 3 points to a​ B, 2 points to a​ C, 1 po
Dafna1 [17]

GPA = 3.59

For calculating the GPA, first calculate the quality points for each grade and course and then add them up like shown below:

A - 4 points x 33 credit hours = 132 quality points

B - ( 3 points x 2 credit hours ) x 3 (because there are 3 courses) = 18 quality points

C - 2 points x 3 credits = 6 quality points

D - 1 point x 2 credits = 2 quality points

Now add up all the quality points = 132 + 18 + 6 + 2 = 158

Add the credit hours as well = 33 + 6 + 3 + 2 = 44

Divide the total quality points by total credit hours to get the GPA = 158/44 = 3.59

6 0
4 years ago
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hammer [34]

i hope it helps please mark me as brainliest please

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3 years ago
Convert this decimal to a simplified fraction:<br><br> 0.32
alexdok [17]
The answer is 8/25
Hope it helped
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