​An analysis of monthly wages paid to workers of two firms A & B belonging to the same industry gives following result:
                                                                         Firm A    Firm B
                No. of workers                                      1000                       1200

              Average monthly wages                     Rs. 2800                  Rs. 2800 
            Variance of distribution of wages              100                         169
                 in which firm, A or B is there greater variability in individual wages ?