Answer:
0.6357 = 63.57% probability of reaching into the box and randomly drawing a chip number that is smaller than 507
Step-by-step explanation:
The probability of drawing each chip is the same, which means that the uniform distribution is used to solve this question.
Uniform distribution:
A distribution is called uniform if each outcome has the same probability of happening.
The uniform distribution has two bounds, a and b, and the probability of finding a value lower than x is given by:

There are 797 identical plastic chips numbered 1 through 797 in a box.
This means that 
What is the probability of reaching into the box and randomly drawing a chip number that is smaller than 507?

0.6357 = 63.57% probability of reaching into the box and randomly drawing a chip number that is smaller than 507