GMAT Quantitative Reasoning Practice Test 7

Statement (1) is sufficient since it gives us the number of players who received red balls.
The number of players who received yellow balls is 40−16=24. Statement (2) is sufficient, Define X as the number of players that received a red ball. x+3x∕2=40
X=16 and so 40−16=24 is the number of players who received a yellow ball.