How many students collected okra seeds?, 6, 4, 2, 5, How many students collected tomato seeds?, 2, 4, 3, 5, How many students collected pechay seeds?, 2, 5, 3, 4, How many students collected eggplant seeds?, 2, 5, 3, 4, How many kinds of seeds were collected in total?, 20, 15, 12, 18.

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