Two players each flip a fair coin. The probability that they get the same result can be expressed as a b where a and b are coprime positive integers. What is the value of a+b ?

Question

Two players each flip a fair coin. The probability that they get the same result can be expressed as a b    where a  and b  are coprime positive integers. What is the value of a+b ?

Reiny · Answer

done here http://www.jiskha.com/display.cgi?id=1365593486

John · Answer

I saw the the problem already answered but I just don't get what is a and what is b.