China Naming Network - Almanac query - Mathematical weather problem
Mathematical weather problem
Note that event A: A is sunny and B: B is sunny. As we all know:
P(A)=7/ 10,P(B)=2/5,P(AB)=3/ 10,
P(Aˉ)= 1-P(A)=3/ 10,
P(A∪B)=P(A)+P(B)-P(AB)=4/5。
P(AˇBˇ)= P[(A∪B)ˇ]= 1-P(A∪B)= 1/5。
P(b\ | a\)= P(a\b\)/P(a\)= 2/3。