Monthly WAGES of workersTo Find : Mean wagesNew Mean If :Monthly wages of each worker is increased by 30 %Number of workers in each category is halvedIn each category Number of workers DOUBLES and wages reduced by 20 % Step-by-step explanation:CI                Class Mark x         F             fx90 - 110          100                     4            400110 - 130         120                     6            720130 - 150        140                     4            560150 - 170         160                    8            1280170 - 190         180                    18           3240                                               40            6200 Mean wages = 6200/40  =   155  Monthly wages of each worker is increased by 30 %Hence new mean = 155 + (30/100)155 = 201.5Number of workers in each category is halved Hence 6200 /2  = 3100   and 40/2 = 20New Mean = 3100/20  = 155   remains same , no changeIn each category Number of workers doubles and wages reduced by 20 % Number of workers doubled cause no impact on meanwages reduced by 20 %   hence new mean = 155 - (20/100)155 =  124Learn More1.The daily wages of 80 workers of a FACTORY.Daily wages (Rs) 500 ... brainly.in/question/12385845 After settlement, the average weekly wage in a factory had ... brainly.in/question/19026105