Basic Concepts Of Permutations And Combinations

20 Questions  I  By Sweetsalman123
Basic Concepts Of Permutations And Combinations

  
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1.  The number of ways a person can contribute to a fund out of 1 ten-rupee note, 1 five- rupee note, 1 two-rupee and 1 one rupee note is
A.
B.
C.
D.
2.  The number of arrangements of the letters in the word FAILURE, so that vowels are always! coming together is
A.
B.
C.
D.
3. 
There are 5 speakers A,B,C,D,E.The number of ways in which A will speak always before B is Options:  A.24 B. C.5! D.None of these
A.
B.
C.
D.
4.  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.
5.  The number of 4 digit numbers formed with the digits 1, 1, 2, 2, 3, 4 is
A.
B.
C.
D.
6.  4 digit numbers to be formed out of the figures 0, 1, 2, 3, 4 (no digit is repeated) then number of such numbers is
A.
B.
C.
D.
7.  In nPr ,n is always 
A.
B.
C.
D.
8. 
Options: A. B. C. D.None of these
A.
B.
C.
D.
9.  If nP4 = 12 x nP2, then is equal to 
A.
B.
C.
D.
10.   If 5Pr= 60, then the value of r is
A.
B.
C.
D.
11.  The number of different factors the number 75600 has is
A.
B.
C.
D.
12.  The number of even numbers greater than 300 can be formed with the digits 1, 2, 3, 4, 5  without repetion is
A.
B.
C.
D.
13.  m+nP2 = 56, m-nP2 = 30 then
A.
B.
C.
D.
14.  The number of ways in which the letters of the word DOGMATIC can be arranged is
A.
B.
C.
D.
15. 
The total number of ways in which six 't' and four '-' signs can be arranged in a line such that no two '-' signs occur together is Options: A. B. C.35 D.None of these
A.
B.
C.
D.
16.  If the letters word 'Daughter' are to be arranged so that vowels occupy the odd places, then number of different words are
A.
B.
C.
D.
17.  In a group of boys the number of arrangement of 4 boys is 12 times the number of arrangements of 2 boys.The number boys in the group is
A.
B.
C.
D.
18.  The number of permutations of 10 different things taken 4 at a time in which one particular thing never occurs is
A.
B.
C.
D.
19.  If n1+n2 P2 = 132, n1-n2P2 = 30 then,  
A.
B.
C.
D.
20.  Lf 500 C92=499C92 + nC91 then x is
A.
B.
C.
D.
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