With reference to Example 3.6, suppose that there are m different types of coupons and Jimmy buys r packs of cereals (with r < m).
With reference to Example 3.6, suppose that there are m different types of coupons and Jimmy buys r packs of cereals (with r < m).
(i) What is the probability that the coupons contained in these r packs are all of a different type?
(ii) Assuming r > 2, find the probability that the r coupons belong to exactly 2 different types.
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