What percent of rolls weigh over 228 grams?

P

Pistol Pete

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New rolls of dimes are delivered to a bank in rolls of fifty coins each. Theses rolls weigh an average of 230 grams with a standard deviation of 5 grams and the weights follow the normal curve quite closely.

What percent of rolls weigh over 228 grams?


Please show work along with the answer.
 
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