The histogram above shows the ages of victims of a pollut...
The histogram above shows the ages of victims of a pollution. How many people were involved in the pollution?
20
21
15
18
Correct answer is A
Age in years1020304050frequency34562
∑f = number of people involved in the pollution
∑f = 3 + 4 + 5 + 6 + 2 = 20
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