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Each day Donna and Mary toss a coin to see who buys the other person coffee ($1.31 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 $ Is this a fair game? (Type an integer or a decimal.)

Each day Donna and Mary toss a coin to see who buys the other person coffee ($1.31 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 $ Is this a fair game? (Type an integer or a decimal.)

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Each day Donna and Mary toss a coin to see who buys the other person coffee ($1.31 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 $ Is this a fair game? No Yes (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 ($1.31 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 $ Is this a fair game? No Yes (Type an integer or a decimal.)
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