[Rank 2: %C6%FB%B3%B5%C1㲿%BC%FE%D4%CB%CA%E4 %D0%D0ҵ%B1%EA] [xây dựng xã hội học tập] [101 ý tưởng khen thưởng] [laÌ€n da] [The Erd˝ os inequality and other inequalities for a triangle] [ iA� � E] [2023] [“Khởi nghiệp tinh gọn] [hình há» c má»›i] [David, the promoter of an outdoor concert, expects a net profit of $100,000, unless it rains, which would reduce the net profit to $40,000. The probability of rain is 0.20. For a premium of $29,000 David can purchase insurance coverage that would pay him $100,000 in case of rain. Find the expe]