Reasoning MCQ for SBI PO/Clerk/ RRB 2018: 13 June
Directions (Q. 1-5): In each question below are given two/three statements followed by two conclusions numbered I and II. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements, disregarding commonly known facts. Give answer
1) if only conclusion I follows.
2) if only conclusion II follows.
3) if either conclusion I or II follows.
4) if neither conclusion I nor II follows.
5) if both conclusions I and II follow.
(1-2):
Some corridors are carroms.
All classes are corners.
1. Conclusions: I. All corridors being corners is a possibility.
II. All carroms being classes is a possibility.
2. Conclusions: I. Some corners are not corridors.
II. No class is a carrom.
3. Statements: Some oceans are lakes.
Some ponds are rivers.
All rivers are lakes.
Conclusions: I. All oceans being rivers is a possibility.
II. Some lakes are not ponds is a possibility.
4. Statements: All blue are brown.
All black are bags.
Some brown are not bags.
Conclusions: I. Some brown are not black.
II. No blue is a bag.
5. Statements: No train is a truck.
Some trains are tumblers.
All trucks are toys.
Conclusions: I. All trucks being tumblers is a possibility.
II. Some toys are not trains.
6. Statements: Some voyages are journeys.
No journey is a trekking.
Conclusions: I. No voyage is trekking.
II. Some trekking are voyages.
Directions (Q. 7-11): Read the following information carefully and answer the questions that follow.
Ten persons are sitting in two parallel rows containing five persons each. In row 1, A, B, C, D and E are sitting and all of them are facing south. In row 2, P, Q, R, S and T are sitting and all of them are facing north. In the given seating arrangement, each member seated in a row faces another member of the other row. Moreover, each of them belongs to different countries – Australia, Brazil, Bulgaria, Belgium, Japan, India, Romania, Indonesia, Iran and Russia but not necessarily in the same order.
There are only two persons sitting between the Australian, who sits at an extreme end, and E. P, who sits in the middle of the row, is not an immediate neighbour of Q, who is not a Russian.
T is sitting at an extreme end. E, a Japanese, sits on the immediate right of the person from Brazil and faces the immediate neighhour of Q. B is not sitting at the extreme left end. P is not from Iran.
There is only one person between C and D, who is from Australia. S, an Indian, is an immediate neighbour of the Russian and does not face the person from Bulgaria.
R, who is from Belgium, is an immediate neighbour of the person from Iran, who in turn faces the immediate neighbour of the Japanese. There are two persons between the Romanian and the Bulgarian. B is not from Romania. T is not from Indonesia
7. A belongs to which of the following countries?
1) Indonesia 2) Romania 3) Bulgaria
4) None of these 5) Can’t be determined
8. Who is from Indonesia?
1) R 2) B 3) T
4) P 5) Can’t be determined
9. ‘Australia’ is related to ‘Romania’ in a certain way, based on their seating positions. Then who is Russia related to, following the same seating positions?
1) Indonesia 2) Iran 3) Brazil
4) India 5) Belgium
10. Four of the following five are alike in a certain way based on their seating positions and so form a group. Which of the following is different from the group?
1) Japan 2) Romania 3) Russia
4) Belgium 5) India
11. Which of the following statements is/are definitely false?
1) B is from Bulgaria.
2) There are two persons sitting between the Indian and the person from Iran.
3) The Brazilian faces the person from Indonesia.
4) The person who is from Iran sits opposite the Australian.
5) All are true
Answers:
1. 4; Some corridors are carroms (I) + No carrom is a corner (E) = I + E = O = Some corridors are not corners. Thus, All corridors being corners is a possibility does not hold true.
Again, No carrom is a corner (E) → conversion → No corner is a carrom (E). Now, All class are corners (A) + No corner is a carrom (E) = A + E = E = No classes is a carrom. Hence, All carroms being classes is a possibility is not true. Thus, neither conclusion I nor II follows.
2. 2; Some corridors are carroms (I) + No carrom is a corner (E) = I + E = O = Some corridors are not corners. Thus, conclusion I does not follow.
Conclusion II follows as we have seen in the explanation to Q. 1
3. 5; Some ponds are rivers (I) + All rivers are lakes (A) = I + A = I = Some ponds are lakes It means Some lakes are not ponds is a possibility. Hence, conclusion II follows.
Again, Some oceans are lakes → conversion → Some lakes are oceans. Now, All rivers are lakes (A) + Some lakes are oceans (I) = A + I = No conclusion, but a possible positive relation exists between ‘river’ and ‘ocean’. Thus, conclusion I follows.
4. 1; Suppose ‘Some brown are not black’ is not true. It means All brown are black. Now, All brown are black + All black are bags = A + A = A = All brown are bags. But this can’t be true because ‘Some brown are not bags’ (given). Hence, our assumption is wrong and conclusion I is true. All blue are brown + Some brown are not bags = A + O = No conclusion. Hence, II does not follow.
5. 5; No train is a truck (E) → conversion → No truck is a train (E) + Some trains are tumblers (I) = E + I = O* = Some tumblers are not trucks it means All trucks being tumblers is a possibility. Hence, conclusion I follows.
Again, No train is a truck (E) + All trucks are toys (A) = E + A = O* = Some toys are not trains. Thus conclusion II follows.
6. 3; Some voyages are journeys (I) + No journeys is a trekking (E) = I + E = O = Some voyages are not trekking. But conclusion I and II make a complementary pair of I – E. Thus, either I or II follows.
(7-11):
7. 2
8. 4
9. 4
10. 3
11. 4
