The probability of finding a broken cookie in a bag of chocolate chip cookies is P= .03. Find the probability of getting at least 2 broken cookies in a bag containing 36 cookies.
A) .91
B) .294
C) .33
D) .06

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- anonymous

- jamiebookeater

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- anonymous

- Valpey

Think of this as the opposite of the question: "What is the probability of finding exactly 0 or exactly 1 broken cookie in a bag of cookies?"

- Valpey

The probability of getting zero broken cookies is the easiest to calculate because it is just the probability that a single cookie is whole raised to the power of the number of cookies.
(disclaimer: we are assuming that cookies being broken are completely independent events which is a horrible horrible assumption if this were in real life since you can drop a bag of cookies and break half of them at once)

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- Valpey

So, what is the probability of 0 broken cookies out of 36?

- anonymous

i have no idea.. sorry i dont get this at all.

- Valpey

What about a bag of two cookies, what is the probability that both are not broken?

- anonymous

idk

- anonymous

- anonymous

- anonymous

@iGreen plz helpp

- anonymous

@iGreen HELLOOO??? U THERE?????

- Valpey

Okay, what about just one cookie, if the chance that it is broken is 0.03, what is the chance that it is not broken?

- anonymous

.294??

- anonymous

- Valpey

If a cookie is broken 3% of the time, what percent of the time is it not broken?

- anonymous

idk can u just tell me i need help and this is my hw and i have a class soon.. just explain it to me

- Valpey

I can't give you the answer @iamabarbiegirl. I need your help to think about the probability of these events happening if we are going to get to a binomial process.

- Valpey

The chance of two independent events both happening is the product of their respective probabilities multiplied together. So if a cookie is whole, say 90% of the time, then two cookies are whole 90% * 90% of the time. 90% * 90% is equal to 81%. (on a calculator we might say 0.90*0.90)

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