3 years ago

The ratio of 7th graders who prefer comedies to 8th graders is:

Mathematics

1 answer:

Len [333]3 years ago

4 0

IS IT 7:8 OR 7 OVER 8

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3 years ago

In a continuous series, mean(x) = 80, assumed mean(A) = 60 and<br>EF=40 then find the value of EFd.

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<h3>Calculating mean using Assumed mean </h3>

From the question, we are to determine the value of Σfd

The formula for mean, using the assumed mean method is given by

$\bar x = A + \frac{\sum fd}{\sum f}$

Where $\bar x$ is the mean

A is the assumed mean

From the given information,

$\bar x = 80$

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Putting the parameters into the equation, we get

$80 = 60 + \frac{\sum fd}{40}$

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$\sum fd = 20 \times 40$

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Hence, the value of Σfd is 800

Learn more on Mean here: brainly.com/question/20118982

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Step-by-step explanation:

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