If two six-sided dice are rolled, the probability that they both show the same number can be expressed as a b where a and b are coprime positive integers. What is the value of a+b ?

Question

If two six-sided dice are rolled, the probability that they both show the same number 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=1365593747

Stranger · Answer

What is a and what is b?