Posted by **tim** on Monday, February 28, 2011 at 9:08pm.

Five percent of all items sold by a mail-order company are returned by customers for a refund. Find the probability that of two items sold during a given hour by this company both will be returned for a refund

- statistics -
**tola**, Monday, February 28, 2011 at 10:50pm
experiment for n=400, p=0.06, where p is the probability of a success

- statistics Tola -
**PsyDAG**, Tuesday, March 1, 2011 at 9:31pm
First, if you have a question, it is much better to put it in as a separate post in <Post a New Question> rather than attaching it to a previous question, where it is more likely to be overlooked.

Second, what is your question?

- statistics tim -
**PsyDAG**, Tuesday, March 1, 2011 at 9:34pm
Assuming that the percentage applies to an hour,

First item p=.05

Second item p = .05

The probability of all/both probabilities occurring is found by multiplying the individual probabilities.

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