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90 pounds. You take all three numbers, add them up, then divide them by the amount of numbers there are:

90+70+110=270
270/3=90

The average weight of Marie, Alice, and Josephine is 90 pounds. Average is nothing but the mean of the data.

How to calculate the average?

The average is calculated by adding all the data values and dividing the result by the total number of data values in a data set or any sequence of data.

E.g., A data set consists of weights a, b and c, then their average weight is [tex]\frac{a+b+c}{3}[/tex].

Calculating the average of the given data:

Given that,

Marie weighs 90 pounds

Alice weighs 70 pounds

Josephine weighs 110 pounds

So,

Average weight = [tex]\frac{90+70+110}{3}[/tex]

                           = [tex]\frac{270}{3}[/tex]

                           = 90 pounds.

∴ The average of the given weights is 90 pounds.

Learn more about the average here:

https://brainly.com/question/20118982

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