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You do not need to type in the formulas. Indicate the n and p for the Binomial setting and describe the steps taken to solve the problem.

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I would need to know more about the type of problem you are working with.  A binomial mean it has two terms like 3x2+5 or 2x3-4x, but I do not know what they are referring to with the variables n and p.
Good luck.  I would be glad to take another look if you can give me some more information.  

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You do not need to type in the formulas. Indicate the n and p for the Binomial setting and describe the steps taken to solve the problem

It has been estimated that about 30% of frozen chickens contain enough salmonella bacteria to cause illness if improperly cooked. A grocery store purchases a random sample of 100 frozen chickens.

a. What is the probability that the store will have at least 20 contaminated chickens?

b. On average, how many contaminated chickens will be in the sample of 100 chickens?
 
n =4
p =0.5 
The n and p was given to me by the teacher, I just am having a hard time figuring this out.