The bookstore was going to order 250 books for seventh grade. A random sample of 25 books , 8 students ordered "Harry Potter and the Order of
the Phoenix" . How many students would order "Harry Potter and the Order of
the Phoenix" of the 250 books ordered.

not sure but it may be b, as i said i'm not sure.

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 %