SOLUTION
Looking at this, we have a total of four prices.
When the first price is picked, the probability becomes

After the first price is picked, we have 3 prices left. The probability of picking the second becomes

Probability of picking the 3rd becomes

Note that this is without replacement, hence the probability of picking the last becomes

So the require probability becomes

Hence the answer is

It is a dependable probability because it is a probability without replacement, since the preceding event has an effect on the probability of the next event
Hence the answer is dependable probability