Permutation And Combination Flashcards
1
Q
Permutation
A
Order ✓
Num syst
Arrangements words
Prize distribution
2
Q
Combination
A
Hand shake
Team formation
Committee formation
3
Q
Npr
A
Ncr*r!
n!/(n-r)!
4
Q
Ncr
A
n!/(n-r)!r!
Nc(n-r)
5
Q
Arrangements
A
N!
6
Q
Word problem
A
Total no. of words/repeated no!)*
7
Q
Vowel
A
Consider all vowel as one
Ncr=n/r *(n-1)C(r-1)
8
Q
Circular arrangements
A
(N-1)!
9
Q
Nacklace
A
(N-1)!/2
10
Q
Dearrangment
A
Dn = n
