Directions: Each question or group of questions is based on a passage, graph, table, or set of conditions. In answering some of the questions, it may be useful to draw a rough diagram. For each question, select the best answer choice given.
Questions 19-22
Seven persons - N, Q, R, S, T, U, and W - are all the persons present at a party. All of them join distinct conversational groups that form during the party and that consist of two, three, or four persons at a time. At any time during the party, each of the persons present is considered to be a member of exactly one of the conversational groups. During the party the following conditions are satisfied:
N can never be in the same conversational group as S.
T must be in a conversational group that includes either S or W, but T cannot be in a conversational group with both S and W.
W must be in a conversational group that consists of exactly three persons.
19. Which of the following lists three conversational groups that can exist at the same time during the party?
(A) N and S Q, T, and W R and U
(B) N and T R and S Q, U, and W
(C) N and U R and S Q, T, and W
(D) N and W S and U Q, R, and T
(E) N, U, and W S and Q R and T
20. If, at a certain point during the party, R, T, and W are members of three distinct conversational groups, S must at that point be in a conversational group that includes:
(A) Q
(B) R
(C) T
(D) U
(E) W
21. If, at a certain point during the party, a group of three persons and a group of four persons have formed and W is in the same conversational group as U, which of the following must at that point be in the group with W and U?
(A) N
(B) Q
(C) R
(D) S
(E) T
22. If, at a certain point during the party, one of the conversational groups consists only of Q, R, and W, at that point N must be part of a group of exactly:
(A) two persons, whose other member is T
(B) two persons, whose other member is U
(C) four persons, whose other members include S
(D) four persons, whose other members include T
(E) four persons, whose other members include U
Detailed Explanation (in Bangla)
Answer Keys