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1. You just bought a new flashlight and it needs one AA battery to function. You have a box of 10 identical-looking AA batteries, but

1. You just bought a new flashlight and it needs one AA battery to function. You have a box of 10 identical-looking AA batteries, but only one of them works. You pull the batteries from the box at random and test all of them in the flashlight one by one. Suppose the working battery is the Xth battery that you try. Find E(X)

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