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Option 1 : All the statements are required to answer the question.
Statement III∶
Total monthly salary of all the Executives is 40% less than total salary of all the Managers;
Total salary of all the employees is Rs. 576000;
∴ (Total salary of managers) + 0.6 × (Total salary of managers) = 576000
⇒ 1.6 × (Total salary of managers) = 576000
⇒ (Total salary of managers) = 576000/1.6 = Rs. 360000
Statement I∶
25% of the salary of a manager is Rs. 15000.
∴ Salary of a manager = Rs. 60000
∴ Total managers = 360000/60000 = 6
Statement II∶
The ratio of number of Executives and Managers is 3 ∶ 2;
∴ Total executives = 9
∴ Total number of employees in the office = 6 + 9 = 15
∴ All the statements are required to answer the question.
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