Trying your hand?

[Guest]

Test No. incompl/inter-1 "Applying for that Job", question 9

Have you ever tried your ......... at running a business?

(a) arm
(b) finger
(c) hand
(d) leg

Test No. incompl/inter-1 "Applying for that Job", answer 9

Have you ever tried your hand at running a business?

Correct answer: (c) hand

Your answer was: incorrect
Have you ever tried your arm at running a business?
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please, could you explain this expression?
Thank you.

[Alan]

Try your hand at doing something means do something as an experiment or for the first time. For example you might be interested in finding a new hobby and a friend could say: Why don't you try your hand at playing golf?
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English as a Second Language
You can read my ESL story Relative Pronoun