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Reading a Bar Graph

The number of...

Question

The number of absentees in grade 11 is recorded and represented as shown below.
What is the mean number of absentees?

A

5

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B

6

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C

8

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D

7

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Solution

The correct option is B 6
From the above bar graph, we can find the data point to be as follows:

Mean = $\frac{S u m o f a l l d a t a p o i n t s}{N u m b e r o f d a t a p o i n t s}$

Thus, the mean number of absentees: $\frac{9 + 3 + 4 + 7 + 7}{5}$ = 6

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