[填空题]
106 runners at a marathonx(p 3 jsg5al7b eveb vi70oliqk06 nt were asked through which media channels they receiveb0q oil07vk i6d information about the marathon. The summary shows that 52 runners answered "TV advertising", 64 answered "social media" and 14 answered "others". Find the probability that a runner selected at random from the marathon received information about the marathon through:
1. both TV advertising and social media; ≈
2. only TV advertising. ≈
