The difference between one half of a number and one fifth of it is 561. Find the number. A. 2805
B. 1870
C. 5610
D. None of these answers

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 %

yeah i know the problem you need. i am taking it right now. the answer is step 3

~mickey