If nCr denotes the number of combinations of n things taken r at a time,then the expression n(r+1+n(r-1)+2*nCr equals
n+1Cr+1
n+2Cr
n+2Cr+1
n+1Cr
If nc10 = nc14,then 25 Cn =
25
24
25!
24!
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
Convert 7.8.9.10.11.12.13.14.15 into factorial
7!
15!/6!
15!/7!
(15-6)!
In how many ways can 3 prizes be distributed among 4 boys,when no boy gets all the prizes
60
68
64
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
How many numbers of 3 digits can be formed with the digits 1,2,3,4,5 when digits may be repeated?
125
725
5
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
The number of diagonals that can be drawn by joining the angular points of a polygon of 20 sides are
190
210
20
170
If nc4 = nc6,then the n=
8
10
2
12
