Question: using excel: In a certain store, there is a 0.3 probability that the scanner price in a bar code will not match the advertised proce.

using excel: In a certain store, there is a 0.3 probability that the scanner price in a bar code will not match the advertised proce. The cashier scans 800 items. What is the expected number of mismatches? The standard deviation? b) what is the approximate normal probability of at least 20 mismatches? c) of more than 30 mismatches

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