9 balls are to be placed in 9 boxes and 5 of the balls cannot fit into 3 small boxes. The number of ways of arranging one ball in each of the boxes is
18720
18270
17280
12780
The number of ways of distributing 8 identical balls in 3 distinct boxes, so that move of the boxes is empty, is
21
38
8C3
5
From 12 books, the difference between number of ways a selection of 5 books when one specified book is always excluded and one specified book is always included, is
64
118
132
330
The ninth term of the expansion is
The number of permutations of the letters of the word 'CONSEQUENCE' in which all the three E's are together is
9! 3!
How many 10 digit numbers can be written by suing digits 9 and 2
10c1 + 9c2
210
10c2
10!
, then r is
4
3
2
The total number of terms in the expansion of (x+y)100 +(x-y)100 after simplification is
51
202
100
50
The sum of the digits in the unit place of all numbers formed with the help of 3,4,5,6 taken all at a time is
18
108
432
144
The total number of terms in the expansion of (x+y)100 + (x-y)100 after simplification is