Discussion

Explanation:

Consider the solution to first question of this set.

​​​​​​​

Employees that use neither Bike nor Car = Total – n(Bi ∪ Ca)
= 500 – (250 + 170 - 65)
= 500 – 355
= 145

Alternately,
Employees that use neither Bike nor Car = Employees that use only Bus + Employees that use none of the three
= 130 + 15
= 145

Hence, 145.

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