A box contains five cyclical discs, with diameters 1, 2, 3, 4, and 5 cm, respectively. We

Question:

A box contains five cyclical discs, with diameters 1, 2, 3, 4, and 5 cm, respectively.

We select a disc at random.

(i) What is the expected length of the disc chosen?

(ii) What is the expected area of the disc chosen?

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