Discrete Mathematics (3140708) MCQs

MCQs of Set Theory

Showing 51 to 60 out of 70 Questions
3 4 5 6 7
51.
Different numbers of three digits can be formed from the digits 1, 2, 3, 4 & 5 is ____.
(a) 25
(b) 125
(c) 625
(d) 3125
Answer:

Option (b)

52.
The number of ways to arrange n distinct objects along a fixed circle is _____.
(a) n!
(b) (n-1)!
(c) (n-2)!
(d) none
Answer:

Option (b)

53.
What is the next permutation in Lexicographic order after 362541?
(a) 364125
(b) 362415
(c) 362514
(d) 365421
Answer:

Option (a)

54.
Find value of n if 3P(n, 4)=5P(n-1, 4).
(a) 5
(b) 10
(c) 15
(d) 20
Answer:

Option (b)

55.
Find value of r if 5P(4, r)=6P(5, r-1).
(a) 3
(b) 8
(c) 3 & 8
(d) none
Answer:

Option (a)

56.
How many three digit numbers can be formed from the six digits 2, 3, 5, 6, 7 & 9 if repetition are not permitted.
(a) 216
(b) 120
(c) 40
(d) 10
Answer:

Option (b)

57.
How many three digit numbers can be formed from the six digits 2, 3, 5, 6, 7 & 9 which are less than 400 if repetition are not permitted?
(a) 216
(b) 120
(c) 40
(d) 10
Answer:

Option (c)

58.
Find the number of ways that a party of seven persons can arrange themselves around a circular table?
(a) 3!
(b) 4!
(c) 5!
(d) 6!
Answer:

Option (d)

59.
Find the number of distinct permutation that can be formed from all the letters of UNUSUAL.
(a) 840
(b) 5040
(c) 2520
(d) 210
Answer:

Option (a)

60.
Find the number of arrangements of the letters of the word INDEPENDENCE with condition that all the vowels always occur together.
(a) 138600
(b) 16800
(c) 1646400
(d) 12600
Answer:

Option (b)

Showing 51 to 60 out of 70 Questions
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