Finally, with X the total number of blocks so that X = X_1 +…
Finally, with X the total number of blocks so that X = X_1 + … + X_n, calculate E(X) by completing the calculation E(X) = E(X_1) + \sum_{i=2}^n E(X_i) = … Your result should be as simplified as possible (and make sure to check that it coincides with your previous answers when n = 1, n = 2, n = 3).
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