If S represents a sample space with 4 discrete elements then

If S represents a sample space with 4 discrete elements, then what is the probability P[S]? 0 one fourth one half 1

Solution

For four discrete elements the sample space S would be = [X1 , X2, X3, X4];

we assign P[X1]+P[X2]+P[X3]+P[X4] = 1; which means probability of getting any of these is 1.

we are sure that when we do experiment we will definitely get anyone of these outcomes,

so the probability of sample space is 1.