Probability of a sure event is

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answer is C.

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Detailed Solution

A sure event is the one that is defined to happen for sure.
Example: Getting a head or tail while tossing a coin once is a sure event as the outcome will definitely be either head or tail.
Thus, the probability of a sure event is 1. Also, the probability of an impossible event is 0 Example: Getting a number 7 while tossing a die is an impossible event as the only possible outcomes are between 1 to 6
Thus, the probability of a sure event is 1.
Therefore, the correct option is 3.

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