Conditional Probability of Exhaustive Events and Given Event
Let be mutually exclusive and exhaustive events with , . Let be any other event with .
STATEMENT-1 : for .
because
STATEMENT-2 : .
Options
Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1
Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1
Statement-1 is True, Statement-2 is False
Statement-1 is False, Statement-2 is True
Topics & Concepts
Step-by-Step Solution
To evaluate the given statements:
Evaluation of STATEMENT-2:
Since are given to be mutually exclusive and exhaustive events, their union is the entire sample space , and they are pairwise disjoint. Therefore:
Hence, STATEMENT-2 is True.
Evaluation of STATEMENT-1:
By the definition of conditional probability:
We are given that , which implies:
However, is any event with . It is entirely possible that for some , the event and are mutually disjoint, i.e., . In that case:
Substituting these values into the inequality:
which is mathematically false.
Therefore, the inequality does not necessarily hold for all .
Hence, STATEMENT-1 is False.
Conclusion:
Statement-1 is False, and Statement-2 is True.
Correct Option: (D)