Erica's Marks in eight consecutive mathematics examinations were 94,83,75,52,71,68,75,49 How can I Determine the total marks that she scored? How can I find her mean mark?

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03-11-2022
Mathematics

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Erica's Marks in eight consecutive mathematics examinations were 94,83,75,52,71,68,75,49 How can I Determine the total marks that she scored? How can I find her mean mark?

Sagot :

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RandyF189006idn RandyF189006idn · Answer 1 · 2022-11-03T00:36:50-04:00

TO DETERMINE THE TOTAL MARKS

To determine the total marks , we will add up all the marks . This will be shown in the equation tab below

[tex]\begin{gathered} \sum_x=\text{ sum / addition of all marks = total marks} \\ \sum_x=94+83+75+52+71+68+75+49=567 \end{gathered}[/tex]

Total marks = 567

Mean mark = Total marks / number of observations

[tex]\begin{gathered} \bar{x}=mean\text{ mark } \\ \bar{x}=\frac{\sum_^x}{n} \\ n=\text{ number of observations } \\ \bar{x}=\frac{567}{8}=70.875 \end{gathered}[/tex]

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