Posted by **Carol** on Sunday, October 21, 2012 at 12:16pm.

How many five digit numbers can be formed from the set of nine numbers (0,1,2,3,4,5,6,7,8) if no number is repeated and no number starts with zero and

a) there are no other restrictins

b) the result must be an odd number

- Math -
**Reiny**, Sunday, October 21, 2012 at 12:41pm
a) no restrictions, except can't start with a zero

so 8x8x7x6x5 = 13440

b) has to be odd, not start with zero

has to end with odd number, there are 4 of these

can't start with zero, leaving 7 (remember one is already gone in the odd spot)

number of cases = 7x7x6x5x4 = 5880

- Math -
**Carol**, Sunday, October 21, 2012 at 12:51pm
thank you!

## Answer This Question

## Related Questions

- math - How many five digit numbers can be formed for the set { 0,1,2,3,4,5,6,7,8...
- math - How many different 6 digit numbers can be formed using the digits 1,2,3,4...
- Math. Explain - From the digits 1, 2, 3, and 4, how many positive integers are ...
- math - Given the set (1,2,3,4,5) how many 3-digit numbers can be formed if the ...
- math - There are 5 numbers in a set of data. There are no repeated numbers. ...
- math - Numbers that are palindromes read the same forward and backward. For ...
- math - Please help me to find the first and third quartiles, Q1 and Q3, of the ...
- math - Mr. digit wanted to assign a number to each student in his class. He ...
- math - What is findind a five number summary of each ser of numbers 7,7,5,4,1,9,...
- math - Please help me to find the five-number summary of the following set of ...

More Related Questions