Find the mortality rate for lifetime distributions including exponential distribution:
With

, used is better than new:
With

, used is as good as new:
With

, used is worse than new:
A casino offers you a game where you pay amount

to participate and then choose a stake amount

. A positive continuous random variable

following a known distribution

is then generated. If

you collect the stake; otherwise you lose. Find the value

that maximizes the profit:
Assuming
WeibullDistribution, find the optimal stake size: