Linear Arrangement, Problem 9

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Six lectures A,B,C,D,E & F are to be organised (one/day) in a span of seven days – from Sunday to Saturday.
A should not be organised on Thursday
C should be organised immediately after F
There should be a gap of two days between D and E
One day there will be no lecture (Friday is not that day). Just before that day D will be organised.
B should be organised on Tuesday & should not be followed by D
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Hello Mr. Agarwal, Firstly thank you for uploading these tutorials. Now my query is why can't the lectures be in the following order:
Sunday-F, Monday-C, Tuesday-B, Wednesday-D, Thursday-no lecture, Friday-A and Saturday-E. Considering this to be true on Friday lecture A as well as C is possible and hence he answer to he question should be cannot be determined.

Please do correct me if I am wrong.

OrdinaryOfficer