Different groups of 50 graduates of an engineering school were asked the
starting annual salary for their first engineering job after graduation, and the
sampling variability was low. if the average salary of one of the groups was
$65,000, which of these is least likely to be the average salary of another of
the groups?

i dont know i just need points

a is the right answer

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 %