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nata0808 [166]
3 years ago
15

A grocery store estimates that customers arrive at the rate of 15 per hour. The cashier can serve customers at a rate 20 per hou

r. Calculate the average number of customers in a system. Group of answer choices 3 2.33 4 2.25 1 1.25 1.75 2.50 3.50 1.50
Mathematics
1 answer:
IrinaK [193]3 years ago
6 0

Answer:

3 customers

Step-by-step explanation:

Rate of arrival (λ) = 15 per hour

Service rate (μ) = 20 per hour

The number of customers in a system given the arrival rate and the mean service rate is given by:

N = \frac{\lambda}{\mu-\lambda}\\

Applying the given data:

N = \frac{15}{20-5}\\N=3\ customers

The average number of customers in the system is 3 customers.

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For each of the following hypothetical studies, identify the primary caution each researcher should have when drawing conclusion
Citrus2011 [14]

Answer:

Ecological correlation

Step-by-step explanation:

According to a different source, the options that come with this question are:

  • Ecological correlation
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Sarah should be careful about the use of an ecological correlation. An ecological correlation describes two variables that are group means, as opposed to a correlation between two variables that describe individuals. In this case, Sarah did pick 75 random students in each state. However, she then obtained the height and weight means for each state, and proceeded to compare these. Therefore, Sarah is not comparing individual values, but means. It is important to notice this, because correlations at a group level can be much higher than those at the individual level.

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kirill [66]
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7 0
3 years ago
Question 15 of 25<br>What is the solution to this equation?<br>X + 8 = -3​
Naddika [18.5K]

Answer:

x=-11

Step-by-step explanation:

x+8=-3

x=-3-8 :- collect like term

since we are adding two negative numbers, we will let the number be negative but add them.

x=-11

Hope it helps :)

6 0
3 years ago
Read 2 more answers
Refer to the isosceles trapezoid shown. Find m(BC)
patriot [66]

Answer:

answer is 9cm

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hopes this helps u

5 0
3 years ago
Math help will mark brainliest
Natasha2012 [34]

Answer:

A

Step-by-step explanation:

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