Answer
Suppose we sampled 2000 golf balls from an "onion bag" that
contains 10000 “experienced” golf balls. Suppose this bag contains
4375 Titleists, 3125 Maxflis, and 2500 Top-Flites. We would expect about 875 of the golf balls to be Titleist and about 500 of the golf balls to be Top-Flites.
Work Step by Step
To keep the same probability, we got 125 "onion bags", just like the one in the problem. Now, we have $125\times80=10000$ golf balls: $125\times35=4375$ Titleists, $125\times25=3125$ Maxflis, and $125\times20=250$ Top-Flites.
