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The histogram above shows the ages of victims o... - JAMB Mathematics 2003 Question

The histogram above shows the ages of victims of a pollution. How many people were involved in the pollution?
A
20
B
21
C
15
D
18
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Correct Option: A

(\begin{array}{c|c} \text{Age in years} & 10 & 20 & 30 & 40 & 50 \hline \text{frequency} & 3 & 4 & 5 & 6 & 2\end{array})

(\sum f ) = number of people involved in the pollution

(\sum f) = 3 + 4 + 5 + 6 + 2 = 20

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