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Mathematical Skills | Permutation and Computation

Q. No. 7:In how many ways can six different rings be worn on four fingers of one hand?
A :
10
B :
12
C :
15
D :
16
Q. No. 8:There are three prizes to be distributed among five students. If no students gets more than one prize, then this can be done in 
A :
10 ways
B :
30 ways
C :
60 ways
D :
80 ways
Q. No. 9:There are 6 equally spaced points A,B,C,D,E and F marked on a circle with radius R. How many convex pentagons of distinctly different areas can be drawn using these points as vertices?
A :
6P5
B :
1
C :
5
D :
None of these
Q. No. 10:Ten different letters of alphabet are given, words with 5 letters are formed from these given letters. Then, the number of words which have at least one letter repeated is 
A :
69760
B :
30240
C :
99748
D :
42386
Q. No. 11:In a hockey championship, there are 153 matches played. Every two team played one match with each other. The number of teams participating in the championship is
A :
18
B :
19
C :
17
D :
16
Q. No. 12:Find the number of ways in which 8064 can be resolved as the product of two factors?
A :
22
B :
24
C :
21
D :
20
 79  12 34 ... 14
Permutation and Computation
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Moderate
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