Question on: JAMB Mathematics - 2003
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
\(\sum f \) = number of people involved in the pollution
\(\sum f\) = 3 + 4 + 5 + 6 + 2 = 20
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