A question paper had ten questions. Each question could only be answered as True (T) or False (F). Each candidate

### Question Asked by a Student from EXXAMM.com Team

Q 2483634547.     A question paper had ten questions. Each question
could only be answered as True (T) or False (F). Each
candidate answered all the questions. Yet, no two
candidates wrote the answers in an identical sequence.
How many different sequences of answers are
possible?
IAS 2010 Prelims
A

20

B

40

C

512

D

1024

#### HINT

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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