I need to do my best, in this and I am. But this one is too difficult I kept searching how to this, but there's nothingthat shows how to do this.. Please help me in it?

Answer:
It looks like there are only 2 races in the 101-120 group and 8 races in the 61-80 group. But there are more participants in the 61-80 group. I would go with the 101-120 group.
Step-by-step explanation:
I wish you good luck!