Posted by **Ash** on Sunday, January 27, 2008 at 6:43pm.

Digit d is randomly selected from the set {1, 2, 3, 4, 5, 6, 7, 8,

9}. Without replacement of d, another digit, e is selected. What

is the probability that the two digit number de is a multiple of 3

- Algebra -
**drwls**, Sunday, January 27, 2008 at 7:13pm
There are 9*8 = 72 possible two digit numbers that can be formed. Those divisible by three are 12, 15, 18, 21, 24, 27, 36, 39, 42, 45, 48, 51, 54, 57, 63, 69, 72, 75, 78, 81, 84, 87, 93, and 96. That's 24 numbers.

The answer is 24/72 = 1/3

## Answer this Question

## Related Questions

- Calculus - Digit d is randomly selected from the set {1, 2, 3, 4, 5, 6, 7, 8, 9...
- math - What is the probability that a randomly selected three-digit number has ...
- math - What is the probability that a randomly selected three-digit number has ...
- math and numbers - What is the probability that a randomly selected three-digit ...
- math - The number uses every number 0-9 the numbers are used only once the ...
- Math - Three digits are randomly selected without replacement from 1, 9, 9 and 6...
- Pre cal - Three digits are randomly selected without replacement for one 1, two ...
- Math - It is a 5 digit no. ,palindrome,divisible by 4,10 digit is cube root of 1...
- Algebra - Math HW HELP! - 1) It is a five-digit whole number. 2) It is a ...
- math - I am a 3-digit number. My first digit is thrice my last digit. The sum of...

More Related Questions