Computing probability for one dice is itself very complicated.
Two dice ! Hope we won't see these problems in real GMAT
I've used calculator to compute the answers and it is 24.
Method will fallow, if it is correct.
The probabilty of getting this question in GMAT is less than the probabilty of a nuclear war in a year. (Two years back, Warren E Buffett predicted that the world will see a nuclear war or catastrophe in 20 years)
So, We may have other issues to worry about
campared to this problem.
1 - (35/36)^n > 1/2
N = 25.
Qus: Does anyone know a method to solve the above equation
with out a calculator.