answer: 35 % is the probability of a late departure or an early arrival.
step-by-step explanation:
let l represents the late departure and e represents the early departure.
then, according to the question,
p(l) = 12 %, p(e) = 27 % and = 4 %
and, we have to find out,
but, we know that,
which is the required equation that will use to find the probability of a late departure or an early departure.
therefore, the probability of a late departure or an early arrival = 35 %