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A question paper had 10 questions. Each question could only be answered as True (T) or false (F). Each candidate answered all the questions. Yet, no two candidate wrote the answers in an identical sequence. How many different sequences of answers are possible ?
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- 20
- 40
- 512
- 1024
Correct Option: D
Each question can be answered in 2 ways.
∴ 10 question can be answered = 210 = 1024 ways
