A chemist mixes a 25% boric acid solution with a 50% boric acid solution to produce a 40% boric acid solution. How much of each solution is required to obtain a total of thirty liters of the 40% boric acid.

1 3 5

step-by-step explanation:

i took the test: )

answer: what are the following choices

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 %