How to solve a Monte Carlo problem?

Question

Mathematics

Friends! I really hope for your help! I can't understand the problem at all. Help, please, knowledgeable people! All good and happiness!
Task:
The Monte Carlo method is used to simulate the random variable X of the simulation model. The random variable X can take on the values ​​6, 7, and 8. With 200 observations, these values ​​are realized with frequencies of 28, 72, and 100, respectively. Determine an interval of random numbers for value X = 7

Answer 1

If I understand correctly,
the whole range is:

0 - 28, 28 - (28+72), (28+72) - (28+72+100) = 0 .. 200

As I understand it, the question is, what interval on this segment will take respectively. "7" values:
from 28 / 200to(28+72) / 200