Question

Probability of sure event is :

• A. $1$
• B. $0$
• C. $100$
• D. $0.1$

Answer 1

The correct option is A $1$

Let $S$ be sample space. Sure event means sample space itself.
$\therefore \text{Probability of sure event}=n\left(S\right)/n\left(S\right)=1$
Option A is correct.