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Question: Seed weights (2.2) Biological measurements on the same species often follow a Normal distribution quite closely. The weights of seeds of a variety of winged bean are approximately Normal with mean 525 milligrams (mg) and standard deviation 110 mg.

(a) What percent of seeds weigh more than 500 mg? Show your method.

(b) If we discard the lightest 10% of these seeds, what is the smallest weight among the remaining seeds? Show your method.

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