15-11-2021
Mathematics

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The mean length of 10 childrens' big finger is 5.9cm.
The mean length of 7 adults' big finger is 7.7cm.
What is the mean length (rounded to 2 DP) of these 17 people's big finger?

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ernika03 ernika03

15-11-2021

It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.

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