The three-digit positive integer has a ones digit of 3. What is the probability that is divisible by \(13\)? Express your answer as a common fraction.

Guest Feb 14, 2022

#1**+1 **

900 / 13 ==69 multiples of 13 between 100 and 999

Of the 69 numbers above, only the following 7 end in 3:

(143, 273, 403, 533, 663, 793, 923) >>Total = 7

But, there are 90 integers between 100 and 999 that end in 3 such as: 103, 113, 123........973, 983, 993.

**Therefore, the probability that it is divisible by 13==7 / 90**

Guest Feb 14, 2022