What is the ruling if the majority of mixed vessels are impure?

Investigation of Mixed Utensils and Garments (التحري في الأواني والثياب)

• One must investigate for both Wudu and drinking.
• One does not investigate for Wudu (must perform Tayammum instead), but may investigate to find a vessel for drinking in necessity.
• One must wash all vessels three times before using any of them.
• One must pray without performing Wudu or Tayammum.