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Roll two red dice and a green dice. Add the two numbers on the red dice and take away the number on the green. What are all the different possible answers?

Given a probability density function find the mean, median and mode of the distribution.

Will the witch make a profit or loss?

What happens if this pdf is the arc of a circle?

How is the length of time between the birth of an animal and the birth of its great great ... great grandparent distributed?

Can you decide whether these short statistical statements are always, sometimes or never true?