Question

find the number of different odd numbers of 4 digits can be formed with the digits 1,2,3,4,5,6,7; the digits in any number being all different​

Answer 1

Step-by-step explanation:

given: there are total of 10 digits (0,1,2,3,4,5,6,7,8,9), and odd numbers cannot have an even units digit, so there are 5 digits/choices (1,3,5,7,9). total four-digit odd integers with different digits: 5*8*8*7=35*64=2240

Answer 2

Answer:

there are total 10 digits.