# Random sample warmup

Test your understanding of random sampling (7.SP.A.2).

### Problem

Imagine we have a cup filled with some unknown ratio of white and black balls.
We select balls one at a time with replacement and count how many white vs. black to estimate this ratio.
After 100 selections we end up with an estimated start fraction, w, h, i, t, e, divided by, b, l, a, c, k, end fraction ratio of start fraction, 60, divided by, 40, end fraction .
If we increase the number of selections beyond 100 can we improve our estimate?
Please choose from one of the following options.