We have sent an email with your new password.

Close this window

Basic Concepts Of Permutations And Combinations

20 Questions  I  By Sweetsalman123
math xmlns=http://www.w3.org/1998/Math/MathMLmsubmn4/mnmsubmi mathvariant=boldP/mimn3/mn/msub/msub/math

  
Changes are done, please start the quiz.


Question Excerpt

Removing question excerpt is a premium feature

Upgrade and get a lot more done!
1.  The number of ways in which the letters of the word DOGMATIC can be arranged is
A.
B.
C.
D.
2.  The number of straight lines obtained by joining 16 points on a plane, no twice of them being on the same line is
A.
B.
C.
D.
3.  At an election there are 5 candidates and 3 members are to be elected. A voter is entitled to vote for any number of candidates not greater than the number to be elected. The number of ways a voter choose to vote is
A.
B.
C.
D.
4.  In nPr, the restriction is  Options: A.n > r B.«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»n«/mi»«mo»§#10878;«/mo»«mi»r«/mi»«/math» C.«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»n«/mi»«mo»§#10877;«/mo»«mi»r«/mi»«/math» D. None of these
A.
B.
C.
D.
5.  The number of different factors the number 75600 has is
A.
B.
C.
D.
6.  The total number of 9 digits numbers of different digits is
A.
B.
C.
D.
7.  If 50 different jewels can be set to form a necklace then the number of ways is Options: A.«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfrac»«mn»1«/mn»«mn»2«/mn»«/mfrac»«mn»50«/mn»«mo»!«/mo»«/math» B.«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfrac»«mn»1«/mn»«mn»2«/mn»«/mfrac»«mn»49«/mn»«mo»!«/mo»«/math» C.49! D.None of these
A.
B.
C.
D.
8.  «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«mn»4«/mn»«msub»«mi mathvariant=¨bold¨»P«/mi»«mn»4«/mn»«/msub»«/msub»«/math» is equal to
A.
B.
C.
D.
9.   nPr can also written as Options: A.«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfrac»«mrow»«mi»n«/mi»«mo»!«/mo»«/mrow»«mrow»«mi»n«/mi»«mo»-«/mo»«mi»r«/mi»«mo»§nbsp;«/mo»«mo»!«/mo»«/mrow»«/mfrac»«/math» B.«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfrac»«mrow»«mi»n«/mi»«mo»!«/mo»«/mrow»«mrow»«mi»r«/mi»«mo»!«/mo»«mo»(«/mo»«mi»n«/mi»«mo»-«/mo»«mi»r«/mi»«mo»)«/mo»«mo»!«/mo»«/mrow»«/mfrac»«/math» C.«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mfrac»«mrow»«mi»r«/mi»«mo»!«/mo»«/mrow»«mrow»«mi»n«/mi»«mo»-«/mo»«mi»r«/mi»«mo»!«/mo»«/mrow»«/mfrac»«/math» D.None of these
A.
B.
C.
D.
10.  Every two persons shakes hands with each other in a party and the total number of hand shakes is 66. The number of guests in the party is
A.
B.
C.
D.
11.  5 letters are written and there are five letter-boxes. The number of ways the letters can be dropped into the boxes, are in each
A.
B.
C.
D.
12.  Lf 500 C92=499C92 + nC91 then x is
A.
B.
C.
D.
13.  If . nP3: nP2 =3:1, then n is equal to
A.
B.
C.
D.
14.  If  «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«msub»«mi»n«/mi»«mi»p«/mi»«/msub»«mrow»«mi»r«/mi»«mo»§nbsp;«/mo»«mo»§nbsp;«/mo»«/mrow»«/msub»«/math»=336 and «math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«msub»«mi»n«/mi»«mi»c«/mi»«/msub»«mi»r«/mi»«/msub»«/math»=56,then n and r  will be
A.
B.
C.
D.
15.  If n1+n2 P2 = 132, n1-n2P2 = 30 then,  
A.
B.
C.
D.
16.  The number of different words that can be formed with 12 consonants and 5 vowels by taking 4 consonants and 3 vowels in each word is Options: A.«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«msub»«mn»12«/mn»«mi»c«/mi»«/msub»«mn»4«/mn»«/msub»«mo»§#215;«/mo»«msub»«mn»5«/mn»«msub»«mi»c«/mi»«mn»3«/mn»«/msub»«/msub»«/math» B.«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«msub»«msub»«mn»17«/mn»«mi»c«/mi»«/msub»«mn»7«/mn»«/msub»«/math» C.4950«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mo»§#215;«/mo»«/math»(7)! D.None of these
A.
B.
C.
D.
17.  The number of ways the letters of the word "Triangle" to be arranged so that the word 'angle' will be always present is
A.
B.
C.
D.
18.  Mr. X and Mr. Y enter into a railway compartment having six vacant seats. The number of ways in which they can occupy the seats is
A.
B.
C.
D.
19.  A committee of 3 ladies and 4 gents is to be formed out of 8 ladies and 7 gents. Mrs. X refuses to serve in a committee in which Mr. Y is a member. The number of such committees is
A.
B.
C.
D.
20.  The number of words that can be made by rearranging the letters of the word APURNA so that vowels and consonants appear alternate is
A.
B.
C.
D.
Back to top

Removing ad is a premium feature

Upgrade and get a lot more done!
Take Another Quiz