How do you calculate
A=210(0.5)^2/5.7

First you do the exponent

210 * 0.5² / 5.7

= 210 * 0.25 / 5.7

Then multiplication and division

= 52.5 / 5.7

≈9.2

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 %