Question 606632
a. How many three digit-numbers can be formed from the digits 1,2,3,4,5 and 6 if each digit can be used only once?
Ans: 6!
----------------------------------
b. How many of these are odd?
last digit is 1,3,or 5
Ans: 3*5!
----------------------------------
c. How many are greater than 600?
1st digit must be 6
Ans: 1*5!
=================
Cheers,
Stan H.