Krishna
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Step 1: Identify the sample space and number of possible outcomes

          NOTE: The sample space of an experiment or random trial is the set of all

          possible outcomes or results of that experiment

                    

            Die has sample space S = {1, 2, 3, 4, 5, 6}

              Number of outcomes n(S) = 6


Step 2: Determine the favorable outcomes for getting a number less than or equal to 4?

            

          Favourable outcomes for number less than or equal to 4  (F) = {4, 3, 2, 1}

            Number of favourable outcomes n(F) = 4


           FORMULA:   P(E) = \frac{\text{Number of trials in which the event happened}}{\text{Total number of trials}}


            Probability P(F) = \frac{4}{6} = \frac{2}{3}

\frac{1}{3}