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Mathematics, 22.10.2019 20:00 luzcastellanos556

Suppose that 25% of all students who have to buy a physical copy of the 9th edition of our textbook want a new copy (the "successes"), whereas the other 75% want a used copy. each chooses independently of the others. consider randomly selecting 30 purchasers. a) what is the expected value of the number of students who want a new copy of the book? write out all formulas in your work.

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