We have:

Maximum distance (in km) = 32;

Minimum distance (in km) = 2

Range = Maximum value – Lowest value

= 32 – 2 = 30

Class size = 5 (given)

∴ Number of intervals = 30/5 = 6

From the above table, we observe that

5 + 11 + 11 + 9 = 36 engineers live at a distance up to 20 km from their place of work.

Only 4 engineers live at a distance of 20 km or more from their work place.