Question: Peter and Paul play Heads or Tails (see Example 1.4). Let Wn be Peters winnings after n matches. Prove that E(Wn) = 0 and V

Peter and Paul play Heads or Tails (see Example 1.4). Let Wn be Peter’s winnings after n matches. Prove that E(Wn) = 0 and V (Wn) = n.

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