If events are exhaustive and mutually exclusive, what is the sum of their probabilities?

B. 1

Step 1: Identify exhaustive events. Step 2: Exhaustive events cover the whole sample space and mutually exclusive events do not overlap, so the sum of probabilities is 1. Step 3: Exam tip: Total probability of a partition of sample space is 1.

Step 1: अवधारणा exhaustive events है। Step 2: Exhaustive events पूरा sample space cover करते हैं और mutually exclusive होने से overlap नहीं होता, इसलिए probabilities का sum 1 होता है। Step 3: Exam note: partition of sample space का total probability 1 होता है।