Step number 2!
Mr Meanor decides to climb up a flight of stairs. He starts from the floor, and can go up one, two, three or four steps at a time. (He rolls a 4 sided die each time to decide which one). What is the probability that at some point he will land on the 2nd step?
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The answer is 0.3125.
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1 solution
There is a 1/4 chance that his first roll will be a 2, and a 1/16 chance that the first two rolls will be a 1 and a 1.
4 1 + 1 6 1 = 0 . 3 1 2 5