The total number of 4-digit numbers is

Find the total number of 9-digit numbers which have all different digits.

The total number of five-digit numbers of different digits in which the digit in the middle is the largest is a. sum_(n=4)^9 ^n P_4 b. 33(3!) c. 30(3!) d. sum_(n=3)^8 n^n P_3

Total number of four digit odd numbers that can be formed by using 0,1,2,3,5,7 is:

The number of 3-digit odd numbers, by using the digits 1,2,3,4,5,6 when the repetition of digits is allowed is :

The number of four-digit numbers that can be made with the digits 1, 2, 3, 4, and 5 in which at least two digits are identical is a. 4^5-5! b. 505 c. 600 d. none of these

Find the number of 4-digit numbersthat can be formed using the digits 1, 2, 3, 4, 5 if no digit is repeated. How many of these will be even?

Find the number of n digit numbers, which contain the digits 2 and 7, but not the digits 0, 1, 8, 9.

In the collection of numbers from -4 to 4. Find the fraction of natural numbers, whole numbers, negative integers to the total number of collection of numbers.