Question 1132765: How many 3 digit no. Can be formed from the digit 3.4,5,7,8,9. How many of them are even?
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! How many 3 digit no. Can be formed from the digit 3.4,5,7,8,9.
--- If it's 3,4,5,7,8,9 and not 3.4:
6*6*6 = 216
---
333
334
335
337
338
339
-
343
344
345
347
348
349
-
etc
------------------
How many of them are even?
The units have to be 4 or 8.
6*6*2 = 72
|
|
|
