Try your hand at running a business

[Tuanh]

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
_________________________

Please explain for me why I can't use "mind" in this sentence?

[Torsten]

Because try your hand at is a set phrase. You might want to click here to get more information:
http://www.english-test.net/forum/ftopic1645.html

TOEFL listening lectures: A university lecture by a professor of Art History