Answer:
i think it is A
Step-by-step explanation:
hope this helped!
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Answer:
I think it is $3.25
Step-by-step explanation:
<u>140*3=420- </u>original price with 140 sold each day
130*3.25=422.5- 10 less hotdogs sold with $0.25 price increase
110*3.75=412.5- 30 less hotdogs sold with $0.75 price increase
90*4.25=391.5- 50 less hotdogs sold with $1.25 price increase
60*5.75=345-80 less hotdogs sold with $2.75 price increase
Answer: V(X) = 0.96
Step-by-step explanation: <u>Variance</u> is defined as the average of the squared difference from the sample or population mean.
For a discrete frequency distribution is calculated following the steps:
1) Determine expected value or mean:


E(X) = 1.2
2) Multiply frequency and the squared difference of x and expected value:


3) Add them:
= 1008 + 36 + 384 + 972 = 2400
4) Divide the sum per frequency total:
![V(X)=\frac{\Sigma [f(x-E(X))^{2}]}{\Sigma f}](https://tex.z-dn.net/?f=V%28X%29%3D%5Cfrac%7B%5CSigma%20%5Bf%28x-E%28X%29%29%5E%7B2%7D%5D%7D%7B%5CSigma%20f%7D)

V(X) = 0.96
The variance of the number of cups of coffee is <u>0.96</u>.