A Starbucks coffee shop serves an average of 3500 customers per day, with a standard deviation of 250. What is the probability they will serve between 3300 and 4000 customers on any given day

And we can find this probability with this difference:  

Step-by-step explanation:

Previous concepts  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem  

Let X the random variable that represent the amount of cofee shops of a population, and for this case we know the distribution for X is given by:  

Where and  

We are interested on this probability  

And the best way to solve this problem is using the normal standard distribution and the z score given by:  

If we apply this formula to our probability we got this:  

And we can find this probability with this difference:  

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation:

answer: what is the conflict?

step-by-step explanation:

*what has happened to new york city?

*what is in the time capsule?

* what did the kidz see that gave them hope?

*what will they do with what they find?

* how will they save the city?

* what challenges will they face along the way?

*what big choice will they make at the climax of the story?

* what lesson do they learn at the end of the story?