Probability of Single Event

Probability of Single Event

Secondary 4

Recap on Secondary \(2\) concept on probability for single event.

Probability is the measurement of chance.

For a finite nonempty sample space of equally likely outcomes, the probability of \(A\) is given by \( \mathrm{P}(A) = \frac{n(A)}{n(S)}\) , where \(0 \le \mathrm{P}(A) \le 1\) and \(n(S)\) is the total number of possible outcomes.

  • If an event is certain to occur, then \(\mathrm{P}(A) = 1\)

  • If an event is impossible to occur, then \(\mathrm{P}(A) = 0\)

  • If \(A\) is any event then \(A'\) represents the event that \(A\) is not happening. \(\to \mathrm{P}(A') = 1 - \mathrm{P}(A)\)

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