The weight of coffee in 70 packets are shown in the following table :  Weight (in g) Number of packets 200-201 201-202 202-203 203-204 204-205 205-206 12 26 20 9 2 1   Determine the modal weight.

Solution.

Here l  = 201, f1 = 26, f0 = 12, f2 = 20, h = 1
$\Rightarrow 201+\left ( \frac{26-12}{2\times 26-12-20} \right )\times 1$
$\Rightarrow 201+\left ( \frac{14}{52-32} \right )$
$\Rightarrow 201+\frac{14}{20}$
$\Rightarrow 201+0\cdot 7= 201\cdot 7 g$