How to find the probability of selecting a particular dime? and relate to probability of winning the lottery?

Question

So the math problem says:

 

Identify the lottery rules of California and show the probability of winning the grand prize. Then relate the probability to something tangible and concrete, such as the probability of selecting one particular dime in a pile of dimes. How high would the pile be?

 

 

So i know that the probability of winning the lottery is 13,983,816 by using the combination rule, however i don't understand how to get the rest of the question.

Answer 1

put 13,983,816 quarters side by side touching in a straight line

the line would be about 235 miles long (a quarter is about 15/16 inch)

all the quarters except one would show heads and the one would show tails

you pay to walk on this 235 mile long line of quarters (without looking) and you can stop at any time anywhere

if the tip of your right foot is on the quarter that shows tails, you win the lottery

what do you think ? is it worth it ?