If 43 Cr-6 = 43C3r+1,then the value of r is
12
8
6
10
The number of ways in which 10 different flowers can be strung to form a garland.So that 4 particular flowers are never separated.
8460
8640
8480
6840
In how many ways 6 gentlemen and 3 ladies can be seated round a table So that every gentleman may have a lady by his side.
720
1440
1880
1040
Suppose the word 'PENCIL' is given to us and we have to form words with the letters of this word,in how many ways we arrange if all words begin with a particular letters.
360 ways
720 ways
24 ways
120 ways
If nc4 = nc6,then the n=
2
The number of combinations of four letters taken word EXAMINATION.
70
136
133
130
The number of ways in which n different beads can be arranged to form necklace are
(n+1)!
n!
(n-1)!/2
(n+1)!/2
In how many ways can 7 persons sit around a table.So that all shall not have the same neighbours in any two arrangements?
180
260
360
In how many ways can 3 prizes be distributed among 4 boys,when no boy gets all the prizes
24
60
68
64
The number of seven digit integers,with sum of the digits equal to 10 and formed by using the digits 1,2 and 3 only is
55
66
77
88