### IBPS Clerk 15-Dec-2012 Question 175

Instructions

Study the following information to answer the given questions :
Eight. friends A. B. C. D. E. F. Ct and H are sitting around a circle facing the centre. not necessarily in the same order. F sits fourth to the left of B. A and H are immediate neighbours of F. C sits third to the left. of A. G sits third to the right of E.

Question 175

# If all the eight friends are made to sit alphabetically in the clockwise direction starting from A, positions of how many will remain unchanged (excluding A) ?

Solution

All are facing centre. Since, F sits fourth to the left of B. This means, F sits opposite B. [Since, there are 8 students]

Now, A and H are F neighbours.

case 1 : If A is to the immediate left of F, The, the condition that C is to the third left of A will be invalid as in this case, B is already in that position.

case 2 : A is to the immediate right of F while H is to the immediate left and C is third to the left of A, i.e. immediate left of H.

The arrangement is :

If all are arranged alphabetically starting from A in clock wise direction. Then, the arrangement will be :

Clearly, positions of none will remain unchanged(excluding A).

Ans - (A)

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