If one third of the liquid contents of a can evaporates on the first day and three fourths of the remainder evaporates on the second day, the fractional part of the original contents remaining at the close of the second day is

 8.063 × 10²⁶

Step-by-step explanation:

From the given information:

Since the hacker knows that the character are lowercases letter, uppercases letter or numerical digits from (0-9).

Then, we have the total number of characters to be:

= 26 + 26 + 10

= 62

Now, for each of the 14 places, we can fill it up with 62 possible ways.

Thus, the probability that the hacker guesses in his first trial is:

=  8.063 × 10²⁶