Question: The answer here is wrong pls help A person randomly selects one of six envelopes. Each envelope contains a check that the person gets to
The answer here is wrong pls help

A person randomly selects one of six envelopes. Each envelope contains a check that the person gets to keep. Determine the person's expectation if three envelopes contain a $494 check and three envelopes contain a $1008 check. The expected value is $ 748.50 . (Simplify your answer. Type an integer or a decimal.)
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