Posted by **Michael** on Thursday, April 22, 2010 at 5:46pm.

What is the theoretical probability of a computer choosing a 2 digit number between 1 and 100 whose ones digit is greater than the tens digit?

- Math -
**Reiny**, Thursday, April 22, 2010 at 6:13pm
lead digit

9, then 8 numbers, e.g. 98 97 96 95 94 93 92 91

8, then 7 numbers

...

2 , then 1 number

number of cases = 9+8+7+6+5+4+3+2+1 = 45

so prob = 45/99 = 5/11

## Answer this Question

## Related Questions

maths I need answer - A 2-digit number has a greater tens digit than the ones ...

math - i am a 4 digit number.my thousands didgit is 4 less than my tens digit.my...

math - i have a six digit question my 100 thousands is one less than my ones ...

Math - i am a 4 digit number between 3000 and 4000.My ones digit is twice my ...

Algebra - Math HW HELP! - 1) It is a five-digit whole number. 2) It is a ...

math - My thousands digit is twice my hundreds digit. The sum of my tens and ...

4th grade - i am a 5 digit number my tens digit is the sum of my hundreds digit ...

4th grade math - I'm a 4 digit number with no 2 digits the same. My ones digit ...

5th grade math - i am a number greater than 40,000 and less than 60,000 my ones ...

singapore math - My 3rd grade son get this math problem. It states that John ...