GMAT Question of the Day (August 4)
If the price of a car includes a 20% mark-up, by what percent will the price of the car be reduced if the mark-up is cut in half?
Question Discussion & Explanation
A five-year clinical trial was conducted to study the effectiveness of hair loss prevention treatments on two different groups of men, all of whom were 25 years old when the trial began. Before the trial began, none of the men had shown signs of hair loss, which is widely believed to be caused primarily by genetic factors. The treatment given to Group A was a pill taken daily for the duration of the trial, and the treatment given to Group B was a topical scalp cream used once daily for the duration of the trial. By the end of the five-year trial, 50% of the members of Group A had experienced some hair loss while only 25% of the members of Group B had experienced some hair loss. Despite these results, the treatment used on Group A was considered significantly more effective in preventing hair loss than the treatment used on Group B.
Which of the following, if true, most helps to explain the apparent discrepancy?
(A) The members of Group B who experienced some hair loss had, on average, a slightly higher degree of hair loss than the members of Group A who experienced some hair loss.
(B) Most members of Group B found using the topical cream to be difficult and inconvenient, while most members of Group A found taking a pill once per day to be easy and convenient.
(C) The treatment used on Group B is significantly more expensive than the treatment used on Group A, and, as a result, a relatively small percentage of the target market would be able to afford the treatment used on Group B.
(D) Group A consisted of men with a family history of hair loss, while Group B consisted of men with no such family history.
(E) Nearly all members of Group B experienced significant side effects such as scalp irritation, unwanted growth of facial hair, and swelling in the hands and feet, while side effects of the treatment used on Group A were rare and minor.
Correct Answer - D - (click and drag your mouse to see the answer)
Like these questions? Get the GMAT Club Quizzes and CAT’s