30-seconds-of-code/snippets/weighted_average.md

title, tags

title	tags
weighted_average	list,intermediate

Returns the weighted average of two or more noumbers.

• Use sum to sum the products of the numbers by it's weight and to sum the weights.
• Use for i in range(len(nums)) to move over every number in the two lists.

def weightedAverage(nums,weights):
    return sum(nums[i] * weights[i] for i in range(len(nums))) / sum(weights)

weightedAverage([1, 2, 3], [0.6,0.2,0.3]) # 1.727272727272727