SOLUTION: How many odd numbers of four digits each can be formed with the digits 0,1,3,5,6 and 7 without repetition ?
Algebra.Com
Question 992416: How many odd numbers of four digits each can be formed with the digits 0,1,3,5,6 and 7 without repetition ?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
There are 5 ways to select the first digit (only 5 because you cannot use zero as a first digit of a four digit number). Then, because you have to not consider the digit selected for the first digit, but are now allowed to use zero, there are, for each of the 5 ways to select the first digit, 5 ways to select the second digit, for a total of 25 ways to select the first two digits. Then, for each of those 25 ways to select the first two digits there are 4 ways to select the third digit. Then there are 3 ways to select the last digit. 5 X 5 X 4 X 3.
John
My calculator said it, I believe it, that settles it
RELATED QUESTIONS
How many odd numbers less than 1000 can be formed by using the digits 0, 3, 5, 7 when... (answered by stanbon)
From the digits (1, 2, 3, 4, 5, 6, 7), how many numbers of four different digits each can (answered by Edwin McCravy)
How many different 3-digit odd numbers can be formed with the digits 0, 1, 2 up to 9 if... (answered by vheroli)
How many four-digit numbers can be
formed using the digits 1, 2, 3, 4, 5, 6, if the... (answered by mccravyedwin,Edwin McCravy,ikleyn)
How many odd numbers of three digits each can be formed from the digits 2,4,6 and 7 if... (answered by Edwin McCravy)
1. How many different 4-digit numbers can be formed from the digits 2, 3, 4, 5, 6, 7, and (answered by Alan3354)
How many odd numbers greater than 70,000 can be formed using the digits 0,1,4,7,8,9.
(a) (answered by greenestamps)
How many three-digit numbers can be formed using the digits 1, 2, 3, 4, 5, 6, 7, 8, 9... (answered by Alan3354)
How many 4-digit numbers can be formed using the digits 1, 2, 3, 4, 5, 6, 7 if... (answered by robertb)