The production yield per hectare of wheat of some farms of a village are given in the following table:
Production yield (in kg/ha) | 40β45 | 45β50 | 50β55 | 55β60 | 60β65 | 65β70 | 70β75 | 75β80 | 80β85 |
Number of farms | 1 | 9 | 15 | 18 | 40 | 26 | 16 | 14 | 10 |