An urn contains three red balls, five white balls, and two black balls. Four bal

Mathematics
Tutor: None Selected Time limit: 1 Day

Jun 8th, 2015

E(x) = P(red)*10 - P(black)*15 = (3/14)(10) - (2/14)(15)

= 30/14 - 30/14

= 0

Jun 8th, 2015

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