Question: Two batteries, with voltages V1 and V2, are connected in series. The total voltage V is given by V = V1 +V2. Assume that V1

Two batteries, with voltages V1 and V2, are connected in series. The total voltage V is given by V = V1 +V2.

Assume that V1 has mean 12 V and standard deviation 1 V, and that V2 has mean 6 V and standard deviation 0.5 V.

a. Find ????V .

b. Assuming V1 and V2 to be independent, find ????V .

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