Final answer:
The percent increase of the golf clubs' price from $250 to $750 is found by dividing the difference in prices ($500) by the original price, and then converting this to a percentage, resulting in a 200% increase.
Step-by-step explanation:
To calculate the percent increase of a set of golf clubs from $250 to $750, we determine the difference between the new price and the original price and then divide that by the original price. Here, the difference is $750 - $250 = $500. To find the percent increase, we divide $500 by the original price $250 and then multiply by 100 to convert it into a percentage.
So, the percent increase is ($500 / $250) × 100 = 200%.
Therefore, the correct answer is B. 200%. The percent increase is neither less than 100 percent nor 100 percent, and certainly, it is a definite number not dependent on a sampled group, so options A, C, and D can be disregarded, as well as the statements in the second part of the question which are not relevant to this calculation.