An analysis of monthly wages paid to workers in two firms A and B, belonging to the same industry, gives the following results
| Firm A | Firm B | |
| No. of wage earners | 586 | 648 |
| Mean of monthly wages | Rs 5253 | Rs 5253 |
| Variance of distribution of wages | 100 | 121 |
Number of wage earners (n1) = 586
Mean of monthly wages (X̄1) = Rs 5253
∴ Mean of monthly wages = (Total monthly wage) / (Number of workers)
⇒ 5253 = (Total monthly wage) / 648
⇒ Total monthly wages = Rs (5253 × 648) = Rs 34,03,944