Question

In a random experiment with sample space $S,$ two events $A$ and $B$ are said to be equally likely, if

• A. $A=B$
• B. $n\left(A\right)=n\left(B\right)$
• C. $A\cap B=\varphi$
• D. $A\cup B=S$

Answer 1

The correct option is B $n\left(A\right)=n\left(B\right)$

In a random experiment with sample space $S,$ two events $A$ and $B$ are said to be equally likely, if number of elements are equal in both sets.
i.e. $n\left(A\right)=n\left(B\right)$