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Printjmc
prealgebra senior
Problem
Keiko tosses one penny and Ephraim tosses two pennies. What is the probability that Ephraim gets the same number of heads that Keiko gets? Express your answer as a common fraction.
Solution
Make a complete list of equally likely outcomes:
The probability that they have the same number of heads is
The probability that they have the same number of heads is
Final answer
\frac{3}{8}