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categoryالرياضيات schoolبكالوريوس event_available2026-07-15

السؤال

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For a charity fundraiser a box contains seven $1 bills, six $2 bills, four $5 bills, two $10 bills, and one $100 bill. A donation of $10 is charged to select one bill at random from the box as a prize. Let X the net contribution to the charity when one person plays the game once (a) Complete the table for the probability distribution of X. X P(X) $9 $8 $5 $0 -590 (b) What is the expected value of the net contribution to charity for one play of the game? (c) The charity would like to receive a net contribution of $1000 for this game. What is the fewest number of times that game must be played for the expected value of the net contribution to be at least $1000.

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