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13 November, 11:34

An american roulette wheel has 38 slots, of which 18 are red, 18 are black, and 2 are green (0 and 00). if you spin the wheel 38 times,

a. intuitively, how many times would you expect the ball to wind up in a green slot?

b. use the formula for expected value to verify your intuition.

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  1. 13 November, 14:02
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    Intuitively, one would think the ball would land in the green spot 2 out of the 38 times, since there are 38 slots and 2 are green.

    The probability that it lands in a green section is 2/38. Multiplying this by the number of times the experiment is performed, we get (2/38) (38) = 2.
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