Question
Solve the following equations: $\cos\text{x}\cos2\text{x}\cos3\text{x}=\frac{1}{4}$
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| Firm A | Firm B | |
| No. of wage earners | 586 | 648 |
| Mean of monthly wages | ₹ 5253 | ₹ 5253 |
| Variance of the distribution of wages. | 100 | 121 |