Answer:
![(1)/(8)](https://img.qammunity.org/2020/formulas/mathematics/college/oishxf3znbtm7sgua7hx3bnp2grk4mwmno.png)
Explanation:
In order to calcilate the probability of something to happen we need to knwo the total number of outcomes possible, in this case from 8 to 15, there are 8 numbers that can be drawn from the bag, if we want to draw only the number 12, there is only 1 possibility to draw it from the bag, then we just divide it:
![Probability=(outcome-desired)/(total-number-of-outcomes)](https://img.qammunity.org/2020/formulas/mathematics/high-school/tdgfobogcuw2nw51eug3iv64zbryhibrvr.png)
![Probability=(1)/(8)](https://img.qammunity.org/2020/formulas/mathematics/high-school/z8utptqzet2ra12i3dumphp01k8f7ss8nd.png)
![Probability=12.5%](https://img.qammunity.org/2020/formulas/mathematics/high-school/xaxpo4mq05rgcelr255dbzvp2f9cf816qu.png)