The area of a trapezoid varies jointly with the height of the trapezoid and the sum of its two bases. the area of one trapezoid is 150 square centimeters when its height is 12 centimeters and its base sum is 25 centimeters. what is the area of a trapezoid having a height of 20 centimeters and a base sum of 35 centimeters?

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 %