What is the probablitiy that a random 3 digit number will end in five?
M Molly New member Joined Dec 31, 2005 Messages 19 Dec 31, 2005 #1 What is the probablitiy that a random 3 digit number will end in five?
pka Elite Member Joined Jan 29, 2005 Messages 11,976 Dec 31, 2005 #2 There are (9)(10)(10)=900 three digit numbers if we count 210 as 3-digits but not 012. How many end is a five: (9)(10)(?)???
There are (9)(10)(10)=900 three digit numbers if we count 210 as 3-digits but not 012. How many end is a five: (9)(10)(?)???
S soroban Elite Member Joined Jan 28, 2005 Messages 5,586 Jan 1, 2006 #4 Hello, Molly! What is the probablitiy that a random 3-digit number will end in five? Click to expand... Denis has a most elegant solution! Whether the numbers may or may not have an initial zero, \(\displaystyle \;\;\)exactly one-tenth of them end in 5. Got it?
Hello, Molly! What is the probablitiy that a random 3-digit number will end in five? Click to expand... Denis has a most elegant solution! Whether the numbers may or may not have an initial zero, \(\displaystyle \;\;\)exactly one-tenth of them end in 5. Got it?
