549 B
549 B
title, tags, firstSeen, lastUpdated
| title | tags | firstSeen | lastUpdated |
|---|---|---|---|
| Weighted average | math,list,intermediate | 2020-10-09T07:00:33+03:00 | 2020-12-24T15:00:53+02:00 |
Returns the weighted average of two or more numbers.
- Use
sum()to sum the products of the numbers by their weight and to sum the weights. - Use
zip()and a list comprehension to iterate over the pairs of values and weights.
def weighted_average(nums, weights):
return sum(x * y for x, y in zip(nums, weights)) / sum(weights)
weighted_average([1, 2, 3], [0.6, 0.2, 0.3]) # 1.72727