Ch.8 :- Sitting Arrangement :- Introduction & Formula
Ex.1 Read the following information carefully and answer the questions based on it.
Five persons are sitting in a row. One of the two persons at the extreme ends is intelligent and other one is fair. A fat person is sitting to the right of a weak person. A tall person is to left of the fair person and the weak person is sitting between intelligent and the fat person.
(i) Tall person is at which place counting from right?
(e) Can’t be determined
(ii) Person to the left of weak person possesses which of the following characteristics?
(e) Can’t be determined
(iii) Which of the following persons is sitting at the center?
Sol. First information given in the question that one of the two persons at the extreme ends is intelligent and other one is fair suggest two figures as shown in Fig. and Fig.
Information that a tall person is sitting to the left of fair person rules out the possibility of Fig. as no person in Fig. can sit to the left of fair person. Therefore,only Fig. shows the correct positions of intelligent and fair persons.Now rest of the information regarding the position of other persons can easily be inserted. The final ranking of their sitting arrangement is as shown in Fig.
Note: Unless given specifically in the question, consider your right the right hand side; and your left the left hand side while arranging the objects.On the basis of the final arrangement we can easily find the answer to the questions above.
(i) Tall person is at second place counting from right. So,the correct answer is option (b).
(ii) Person left of weak person possesses intelligence.Hence, the correct answer is option (a).
(iii) Fat person is sitting at the center. So, the correct answer is option (b).
Ex. 2. Six persons are sitting in a circle facing the centre of the circle. Parikh is between Babita and Narendra. Asha is between Chitra and Pankaj. Chitra is to the immediate left of Babita. Who is to the immediate right of Babita?
(e) None of these
Sol. On the basis of two informations that Parikh is between Babita and Narendra and Asha is between Chitra and Pankaj, we can determine the exact positions of persons
sitting adjacent to Asha and Parikh. However, the last information that Chitra is to the immediate left of Babita
fixes the position of all the six persons as in the Fig.On the basis of which we can determine that Parikh is sitting to the immediate right of Babita. So. the correct answer is (a).
Ex. 3. Four men A, B, C and D and four women W, X, Y and Z are sitting round a table facing each other
(i) No two men or women are sitting together.
(ii) W is to the right of B.
(iii) Y is facing X and is to the left of A.
(iv) C is to the right of Z.
Who are the two persons sitting adjacent to D ?
(a) Wand Y
(b) X and W
(c) X and Z
(d) Wand Z
(e) Cannot be determined.
Sol. Fig. represents the exact position of all the eight persons. The sitting arrangement fulfills all the conditions given in the question. We observe that D is sitting between Wand Y. Hence, the correct answer is (a).