11. Assertion
(A): The coin when flipped next time will come up tails.
Reason (R): Because the
coin was flipped five times in a row, and each time it came up heads.
Choose the correct answer from below:
(A) Both (A) and (R) are true, and (R) is the
correct explanation of (A).
(B) Both (A) and (R) are false, and (R) is
the correct explanation of (A).
(C) (A) is doubtful, (R) is true, and (R) is
not the correct explanation of (A).
(D) (A) is doubtful, (R) is false, and (R) is
the correct explanation of (A).
Answer: C
12. The
relation ‘is a sister of ’ is
(A) non-symmetrical (B) symmetrical
(C) asymmetrical (D) transitive
Answer: D
13. If
the proposition “Vegetarians are not meat eaters” is false, then which of the
following inferences is correct ? Choose from the codes given below :
1. “Some vegetarians are meat eaters” is
true.
2. “All vegetarians are meat eaters” is
doubtful.
3. “Some vegetarians are not meat eaters” is
true.
4. “Some vegetarians are not meat eaters” is
doubtful.
Codes:
(A) 1, 2 and 3 (B) 2, 3 and 4
(C) 1, 3 and 4 (D) 1, 2 and 4
Answer: A
14. Determine
the nature of the following definition:
‘Poor’ means having an annual income of Rs.10,000.
(A) persuasive (B) precising
(C) lexical (D) stipulative
Answer: B
15. Which
one of the following is not an argument?
(A) If today is Tuesday, tomorrow will be
Wednesday.
(B) Since today is Tuesday, tomorrow will be
Wednesday.
(C) Ram insulted me so I punched him in the
nose.
(D) Ram is not at home, so he must have gone
to town.
Answer: A
16. Venn
diagram is a kind of diagram to
(A) represent and assess the truth of
elementary inferences with the help of Boolean Algebra of classes.
(B) represent and assess the validity of
elementary inferences with the help of Boolean Algebra of classes.
(C) represent but not assess the validity of
elementary inferences with the help of Boolean Algebra of classes.
(D) assess but not represent the validity of
elementary inferences with the help of Boolean Algebra of classes.
Answer: B
17. Inductive
logic studies the way in which a premise may
(A) support and entail a conclusion
(B) not support but entail a conclusion
(C) neither support nor entail a conclusion
(D) support a conclusion without entailing it
Answer: D
18. Which
of the following statements are true? Choose from the codes given below.
1. Some arguments, while not completely
valid, are almost valid.
2. A sound argument may be invalid.
3. A cogent argument may have a probably
false conclusion.
4. A statement may be true or false.
Codes:
(A) 1 and 2 (B)
1, 3 and 4
(C) 4 alone (D)
3 and 4
Answer: C
19. If
the side of the square increases by 40%, then the area of the square increases
by
(A) 60 % (B)
40 %
(C) 196 % (D)
96 %
Answer: D
20. There
are 10 lamps in a hall. Each one of them can be switched on independently. The
number of ways in which hall can be illuminated is
(A) 102 (B) 1023
(C) 210 (D) 10 !
Answer: B
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