Question: One DC serves two stores in eastern PA and western PA. Demand at each store follows a normal distribution. If standard deviation of demand for

One DC serves two stores in eastern PA and western PA. Demand at each store follows a normal distribution. If standard deviation of demand for eastern PA store is 24, and standard deviation of demand for western PA store is 18, what is the standard deviation of demand for the DC, if we assume demand for eastern and western PA are independent?

Round answer to nearest whole number.

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