Please Help!
Look at the pattern.
What is the ratio of the area of the unshaded parts to the area of
the shaded parts in Figure 4? Express your answer as a ratio in its
simplest form.

16:27

Step-by-step explanation:

16 white squares and 27 shaded squares

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 %