A. 17,430
B. 17,431
C. 17,280
D. 17,281
The number of 4 letters word that can be formed from using the letters of word DELHI which begin and end with an vowel when repetitions are allowed is
If 15Pr-1 : 16Pr-2 = 3 : 4 then r =
The number of odd numbers between 1000 and 10000 can be formed with the digits 1,2,3,4,5,6,7,8,9 is
The letters of word VICTORY are permuted in all possible ways and the words thus formed are arranged as in a dictionary.The rank of the word VICTORY is
If (n+1)P5:nP6= 2: 7 then n =
The number of four digited even numbers that can be formed from the digits 0,1,2,5,7,8 is
The number of even divisors of 1600 is
If nPr =30240 and nCr=252then the ordered pair (n, r) is equal to
The sum of all possible numbers greater than 2000 formed by using the digits 2,3,4,5 is
The number of four digited numbers that can be formed from using the digits 2,4,5, 7,8 that are divisible by 4 is