Using the principle of inclusion-exclusion: P(A ∪ B) = P(A) + P(B) - P(A ∩ B)

We need: P(female or living in territory B) = P(Female) + P(Living in territory B) - P(female and living in territory B)

Given:

• Total drivers = 300 male + 200 female = 500
• Female drivers = 200
• Drivers in territory B = Total drivers - drivers in territory A = 500 - (100 male + 100 female) = 500 - 200 = 300
• Female drivers in territory B = Total female drivers - female drivers in territory A = 200 - 100 = 100

Calculation: P(female or living in territory B) = (200/500) + (300/500) - (100/500) = 400/500

Number of drivers = (400/500) × 500 = 400

Therefore, 400 drivers are either female or live in territory B.