The answer provides calculations for the number of employees using specific modes of transportation in the given scenario.
Employees using metro or trolleybus but not bus: To find this, we calculate: (Metro or Trolleybus) - (Metro and Trolleybus and not bus) = 634 - 101 = 533 employees.
Employees using only one mode of transportation: Metro only + Trolleybus only + Bus only = 201 + 240 + 0 = 441 employees.
Employees using only trolleybus: Trolleybus only = 240 employees.
Employees using metro, trolleybus, and bus: To find this, we calculate: Metro and Trolleybus and Bus = Total - No transport - (Metro or Trolleybus or Bus) + (Metro and Trolleybus and not Bus) = 1000 - 176 - (634) + 101 = 291 employees.
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