Two airplanes can land randomly at three different airports

Two airplanes can land randomly at three different airports. Calculate the probability that both planes land at the same airport.

Solution

There are 3*3 = 9 ways for them to choose the airport they will alnd on.

Of these, there are 3 ways so that they land on the same airport.

Thus,

P(same airport) = 3/9 = 1/3 or 0.33333333 [ANSWER]