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Each day Donna and Mary toss a coin to see who buys the other person coffee ($1.79 a cup). One tosses and the other calls the outcome. If the person who calls the outcome is correct, the other buys the coffee; otherwise the caller pays. Assume that an honest coin is used, that Mary tosses the coin, and that Donna calls the outcome. Find Mary's expected payback. Is this a fair game? Mary's expected payback is $. (Type an integer or a decimal.)

Each day Donna and Mary toss a coin to see who buys the other person coffee ($1.79 a cup). One tosses and the other calls the outcome. If the person who calls the outcome is correct, the other buys the coffee; otherwise the caller pays. Assume that an honest coin is used, that Mary tosses the coin, and that Donna calls the outcome. Find Mary's expected payback. Is this a fair game? Mary's expected payback is $. (Type an integer or a decimal.)

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Each day Donna and Mary toss a coin to see who buys the other person coffee ($1.79 a cup). One tosses and the other calls the outcome. If the person who calls the outcome is correct, the other buys the coffee; otherwise the caller pays. Assume that an honest coin is used, that Mary tosses the coin, and that Donna calls the outcome. Find Mary's expected payback. Is this a fair game? Mary's expected payback is $ . (Type an integer or a decimal.)
Transcribed Image Text:Each day Donna and Mary toss a coin to see who buys the other person coffee ($1.79 a cup). One tosses and the other calls the outcome. If the person who calls the outcome is correct, the other buys the coffee; otherwise the caller pays. Assume that an honest coin is used, that Mary tosses the coin, and that Donna calls the outcome. Find Mary's expected payback. Is this a fair game? Mary's expected payback is $ . (Type an integer or a decimal.)
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