22 lines
539 B
Markdown
22 lines
539 B
Markdown
---
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title: Weighted average
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type: snippet
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tags: [math,list]
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cover: digital-nomad-4
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dateModified: 2020-12-24T15:00:53+02:00
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---
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Returns the weighted average of two or more numbers.
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- Use `sum()` to sum the products of the numbers by their weight and to sum the weights.
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- Use `zip()` and a list comprehension to iterate over the pairs of values and weights.
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```py
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def weighted_average(nums, weights):
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return sum(x * y for x, y in zip(nums, weights)) / sum(weights)
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```
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```py
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weighted_average([1, 2, 3], [0.6, 0.2, 0.3]) # 1.72727
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```
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