She should use a computer to select 30 students at random then ask which ones play chess. The other options could produce more skewed results.
3 and 17
17-3=14
hope that helps
Answer:
$600
Step-by-step explanation:
75*100/450
7500/450
600
<em>Thank me later :)</em>
(<em>Or just give brainliest)</em>
