Respuesta :

Hrishii

Step-by-step explanation:

[tex]mid \: value \\ = \frac{upper \: limit + lower \: limit}{2} \\ \\ for \: example \\ for \: group \: 10 - 20 \\ mide \: value = \frac{20 + 10}{2} = \frac{30}{2} = 15[/tex]