Question

At a casino, there are two kinds of slot machines: ones with a white panda sticker and ones with black panda stickers. Eve rigged some of the machines to have an increased chance of winning: 5% is normal and 40% is rigged. You only know that there are 50-50 odds that either white panda or black panda are rigged or not.

Alice put her money into the white panda machine and the machine says "Sorry, you lose." What is the probability that the white panda machines are rigged? What if you put your money into the same machine and you also lost. What's the probability now?

Answer 1

Ans A) 0.39

B) 0.1521