Mathematics, 06.11.2020 14:00 SandyRiverty

The mean length of 11 childrens' big finger is 12.2cm. The mean length of 4 adults' big finger is 14.7cm. What is the mean length (rounded to 2 DP) of these 15 people's big finger?

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The mean length of 11 childrens' big finger is 12.2cm. The mean length of 4 adults' big finger is 14...

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