A lottery. Played 50 tickets for 1 ruble

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Sold: 2 last one 16.11.2020
Refunds: 0

Uploaded: 09.09.2013
Content: 8.docx 23,58 kB

Product description


A lottery. Played 50 tickets for 1 ruble. It is known that among the 30 winning tickets 1 rub., 2 - 10 rubles. Purchased 2 tickets. Calculate the expectation of net income.

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