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Published on: 27/08/2019
Permutation and Combination
Download CBSE Class 11th Standard CBSE Mathematics question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 11th Standard CBSE Mathematics
Questions + Answers key
Take MCQ Mathematics Test
1.
If n+1C3 = 2.nC2 then n is equal to ______.
2
3
4
5
2.
If C0 + C1 + C2 +...+Cn = 256 then 2nC2 is equal to ______.
45
105
120
130
3.
6C1 + 6C2+6C3+6C4+6C5+6C6 is equal to ______.
63
43
83
none of these
4.
If nCr+nCr+1=n+1Cx then x is equal to ______.
r-2
r-1
n+1
r+1
5.
If mC2 = nC1 then ______.
m = 2n
m(m-1) = 2n
m = 2n(n+1)
none of these
6.
If 40Cr+2 = 40Cr-2 then r is equal to ______.
20
18
14
28
7.
The number of arrangements of the letters of the word BHARAT taking 3 at a time is ______.
54
120
62
72
8.
The number of ways in which 8 men can be arranged in a row so that three particular men are seated consecutively is ______.
6! \(\times\)3!
5!
9! \(\times\) 3!
none of these
9.
The number of ways to arrange the letters of the word HAPPY are ______.
120
90
40
60
10.
Total number of words formed by 3 vowels and 5 consonants taken from 4 vowels and 7 consonants is equal to ______.
75360
60480
54230
none of these
1.
(d)
5
2.
(c)
120
3.
(a)
63
4.
(d)
r+1
5.
(b)
m(m-1) = 2n
6.
(a)
20
7.
(d)
72
8.
(a)
6! \(\times\)3!
9.
(d)
60
10.
(b)
60480
11th Standard CBSE Syllabus & Materials
11th Standard CBSE
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CBSE 11th Standard CBSE Subjects
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