SOLUTION: how many different odd number of four digits can be formed with the digits 1,2,3,4,5,6,7.the digits in any number being all different?

Algebra ->  Permutations -> SOLUTION: how many different odd number of four digits can be formed with the digits 1,2,3,4,5,6,7.the digits in any number being all different?       Log On


   

Question 770104: how many different odd number of four digits can be formed with the digits 1,2,3,4,5,6,7.the digits in any number being all different?
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
how many different odd number of four digits can be formed with the digits 1,2,3,4,5,6,7.the digits in any number being all different?


Work:
the last number can be 1,3,5 or 7
And the first 3 numbers can be selected in 6P3 = 120 ways
So the answer is 120*7 = 840
Answer: 840
You can ask me more at: mthman@gmail.com
Thanks