Discussion

Explanation:

Option 1 implies that no subject borrows from the theory of probability other than Physics, which is not supported by the passage.
Options 2 and 3 can be eliminated since the passage does not so much deal with 'inaccurate application' as much as it deals with the absence of an exact definition of probability and the relation between probability and experience.
Option 4 can be inferred from the lines "physicists make much use of ... mean by 'probability'."
Option 5 can be eliminated since there is no mention of "physical objects" in the passage at all.
Hence, the correct answer is option 4.

» Your doubt will be displayed only after approval.