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## numpy を使うやり方
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```
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## random モジュールを使うやり方
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random.choices() でもできます。
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```
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random.choices(population, weights=None, *, cum_weights=None, k=1)
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```
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* population: 選択するアイテム一覧
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* weights: 各アイテムを選択する確率
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* k: 選択する数
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[random --- 擬似乱数を生成する — Python 3.8.4rc1 ドキュメント](https://docs.python.org/ja/3/library/random.html#random.choices)
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```python
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import random
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items = ["1等", "2等", "3等"] # 内容
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prob = [0.1, 0.3, 0.6] # 確率
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N = 10 # 回数
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n = random.choices(items, weights=prob, k=N)
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print(n)
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# ['3等', '1等', '2等', '3等', '1等', '2等', '2等', '3等', '3等', '2等']
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```
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