Question: In a game a player either loses $1 with a probability 0.25. wins $1 with a probability 0.4. or wins $4 with a probability 0.35.

In a game a player either loses $1 with a probability 0.25. wins $1 with a probability 0.4. or wins $4 with a probability 0.35. What are the expectation and the standard deviation of the winnings'.'

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