19 lines
473 B
Markdown
19 lines
473 B
Markdown
---
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title: weighted_average
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tags: list,intermediate
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---
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Returns the weighted average of two or more noumbers.
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- Use `sum` to sum the products of the numbers by it's weight and to sum the weights.
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- Use `for i in range(len(nums))` to move over every number in the two lists.
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```py
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def weightedAverage(nums,weights):
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return sum(nums[i] * weights[i] for i in range(len(nums))) / sum(weights)
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```
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```py
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weightedAverage([1, 2, 3], [0.6,0.2,0.3]) # 1.727272727272727
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```
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