The number of nails of a given length is norm ally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. Find the number of nails in a bag of 120 that are over 5.03 in. long.
A. About 40 nails
B. About 30 nails
C. About 20 nails
D. About 10 nails
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