What is the percentage difference between the number of people in the height range 159.5 - 169.5cm and 169.5 - 179.5cm?

6.67 %

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5.67 %

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7.67 %

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8.67

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Solution

The correct option is A 6.67 %
From the graph, we can see total number of people = (6+9+7+5+2+1)
= 30
Number of people in the height range 159.5 - 169.5 cm = 7

Number of people in the height range 169.5 - 179.5 cm = 5

Difference between height range 159.5 - 169.5cm and 169.5 – 179.5cm= 7 - 5 = 2

Percentage difference between height range 159.5 – 169.5 cm and 169.5 – 179.5 cm
= $\frac{2}{30} \times 100 = 6.67 %$

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