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The mean of the scores of 20 students in a mathematics test is ____ marks.

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Detailed Solution

The mean of the scores of 20 students in a mathematics test is 35 marks.
Table

Description automatically generated

We are given the data of scores of 20 students in a mathematics test.
Tabulating the given data to obtain the product of frequency of the data with each observation: Question Image

Mean can be calculated by using the direct method as,

x ¯ = ∑ f i x i ∑ f i

.
Substitute 20 for

∑ f i

, and 700 for

∑ f i x i

, to obtain the mean of the given data.
Question Image

\Rightarrow \frac{700}{20}

\Rightarrow 35

Therefore, the mean of the given data is 35 marks.

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