Events A,B,CA, B, CA,B,C are independent with P(A)=1/2,P(B)=1/3,P(C)=1/4P(A)=1/2, P(B)=1/3, P(C)=1/4P(A)=1/2,P(B)=1/3,P(C)=1/4. What is P(A∣A∪B∪C)P(A| A \cup B \cup C)P(A∣A∪B∪C)?
12\frac{1}{2}21
13\frac{1}{3}31
611\frac{6}{11}116
1223\frac{12}{23}2312