12
a farmer has a field that is in the shape of a trape
he measures the field so that he can work out the area.
he puts his measurements on this diagram of the field.
180 m
150 m
220 m
ad hin moneurements to two significant figures.

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 %