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(1 point) Rework problem 15 from section 4.3 of your text, involving the expected number of...

(1 point) Rework problem 15 from section 4.3 of your text, involving the expected number of heads when flipping one of two coins. One coin is fair and one is weighted so that Pr[H]=13Pr[H]=13. You randomly select one of the two coins, and flip it 2 times, noting the result of each flip.

What is the expected number of heads?

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