Percent of correct orders of a drive

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1. In a recent month, the percent of correct orders of a drive through hamburger restaurant was approximately 90%. Suppose that you and two friends go to the drive-thru window at the restaurant and each of you place an order. Find the probability that

1) all three order will be filled accurately

2) one of them is accurately filled

3) none of them are accurately filled

2. The quality control manager of Marilyn's Cookies is inspecting a batch of chocolate-chip cookies that has just been baked. If the production process is in control, the mean number of chocolate-chip parts per cookie is 6.0. What is the probability that in any particular cookie being inspected 

1) fewer than five chocolate-chip parts will be found? 

2) exactly five chocolate-chip parts will be found?

3) five or more chocolate-chip parts will be found? 

3. At the same restaurant, the average cars waiting on the drive-thru is about 7 cars. If we assume that the waiting time is distributed by Poisson distribution, find the probability that 

1) no car is waiting

2) 1 car is waiting

3) 2 cars are waiting 

4) at least 4 cars are waiting

Reference no: EM132385036

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