at a library book sale, there is one price for hardback books and one price for paperback books. last week, 70 hardbacks and 120 paperbacks were sold for a total of $165. this week, 80 hard backs and 180 paperbacks were sold for $210. write a system of equations that can be solved to find h, the price in dollars of each hardback book and the price in dollars of each paperback book

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 %

70 years.

step-by-step explanation: