Here's the question you clicked on:
sonusharma
Your box of cereal may be a contest winner! It's rattling, which 100% of winning boxes do. Of course 1% of all boxes rattle and only one box in a million is a winner. What is the probability that your box is a winner? Please specify your answer as a probability (i.e. .05 rather than 5%).
1 in 100 rattles. 1 in 1 000 000 is a winner. So 1 in 10 000 of rattling boxes is a winning box -> 0.0001