Maria is waiting at a bus stop for her friend Sarah so that they meet and go to a concert together.Maria wants to know how long she will have to wait until the next bus arrives at the bus stop and whether Sarah will be on it. A suitable sample space for this experiment is (a “0” below indicates that Sarah will not be on the next bus, while a “1” indicates she will be; further, t stands for Maria’s waiting time until the arrival of the next bus):

(a) Ω1 = {0, 1}

(b) Ω2 = {(1, t) ∶ t ≥ 0}

(c) Ω3 = {(i, t) ∶ i = 0, 1 and t ≥ 0}

(d) Ω4 = {0, 1} ∪ [0, ∞)

(e) Ω5 = {0, 1} ∩ [0, ∞).