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As a packet delivery driver, I load my van with 20 packets each day. The average...

As a packet delivery driver, I load my van with 20 packets each day. The average weight of a packet I carry is 10kg, with a standard deviation of 2kg. If X is the total weight of the packets, what is the probability that this weight is: a. Exactly 200kg b. Less than 200kg c. More than 250kg. d. Between 220 and 250kg

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