The 150 residents of the town of wonderland were asked their age and whether they preferred vanilla, chocolate, or swirled froze
n yogurt. the results are displayed next. chocolate vanilla swirl under 25 years old 40 20 15 at least 25 years old 15 40 20 what is the probability that a randomly selected customer prefers vanilla?
<span>Residents who are under 25 years and those above are mutually exclusive.
Let V = number of persons who take Vanilla under 25yrs and V' be the number of residents who are at least 25yrs who take Vanilla.
Okay, so P(V) = 40/150 and P(V') = 15/150
P(V or V') = 40/150 + 15/150 = 0.366</span>
