Question:** An entomologist is studying pollination patterns and observes that a certain bee visits 5 different flower species: 2 types of roses, 2 types of lilies, and 1 tulip. If the bee visits each flower once in a random order but always visits both roses before any lily, how many valid visit sequences are possible, assuming flowers of the same type are indistinguishable?

Sun, 03 May 2026 02:24:50 +0000

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