A bag of potato chips claims to contain 7 oz. of potato chips. Random sampling determines that the bags contain an average of 7. with a standard…

A bag of potato chips claims to contain 7 oz. of potato chips. Random sampling determines that the bags contain an average of 7.2 oz. with a standard deviation of 0.081 oz.

What is the maximum weight that 20% of the bags contain less than?

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