Daily Income(In) | 100−120 | 120−140 | 140−160 | 160−180 | 180−200 |
Number of workers | 12 | 14 | 8 | 6 | 10 |
Daily income | No. of workers(Cumulative frequency) |
Less than 100 | 0 |
Less than 120 | 0+12=12 |
Less than 140 | 12+14=26 |
Less than 160 | 26+8=34 |
Less than 180 | 34+6=40 |
Less than 200 | 40+10=50 |