Question

If S be the sample space and E be the event then P (E) = __________

1. $\frac{n\left(E\right)}{n\left(S\right)}$
2. $\frac{n\left(S\right)}{n\left(E\right)}$
3. $n\left(E\right)$
4. $n\left(S\right)$

Answer: $\frac{n\left(E\right)}{n\left(S\right)}$

Solution :-

Probability of an event : Let S be a sample space and E be an event, such that n(S) = n and n(E) = m.

If each outcomes is equally likely, then it follows that

So, correct answer is option-1, $\to \frac{n\left(E\right)}{n\left(S\right)}$