Q6. The probability that a factory will open a branch in Riyadh is 0.7, the probability that it will open a branch in Jeddah is 0.4, and the probability that it will open a branch in either Riyadh or Jeddah or both is 0.8. Then, the probability that it will open a branch: 1) in both cities is: (A) 0.1 (B) 0.9 (C) 0.3 (D) 0.8 2) in neither city is: (A) 0.4 (B) 0.7 (C) 0.3 (D) 0.2