In a 2×2 table, if (AB)=100, (Aβ)=150, (αB)=200, (αβ)=250, the total N is: MCQ with Answer and Explanation

Explanation:
For independent events, P(A∩B)=P(A)P(B)=0.3×0.4=0.12. Then P(A∪B)=P(A)+P(B)-P(A∩B)=0.3+0.4-0.12=0.58, applying the addition theorem with the independence condition.

Explanation:
Secondary data refers to information that was previously gathered by another party for a different objective and is now being reused for a new study.

Explanation:
Civil registration system records births and deaths as they occur.