There are a total of 10 pigs and ducks in a barn. there are 36 legs in all

8 pigs and 2 ducks

Step-by-step explanation:

You put this into the equation x+y=10; 4x+2y=36 to get your answer. You can then solve it.

a and c

step-by-step explanation:

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 %