A question paper had 10 questions.Each question could only be answered as True(T) or False(F).Each candidate answered all questions. Yet , no two candidates wrote the answers in an identical sequence.How many different sequences of answers are possible ?
a 20
b 40
c 512
d 1024
(IAS-PRE-2010)
Answers
Answered by
2
Not sure bt 40 I have no clear
Similar questions