6 persons A, B, C, D, E and F are sitting in a row facing north (not necessarily in the same order). A is the immediate neighbour of D and F. F is the immediate neighbour of E and A. B is in the second position from the right end. If D is not at any of the ends, then how many persons are sitting towards the left of D?
Answer & explanation
Correct answer: option 4
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Answer: 3
In this question we will first place B second from the right end.
There will be now two ways to place the others
E F A D or D A F E, but we know D cannot sit at corner so now only one option is left. And C sits at the right end