Martha takes a road trip from point A to point B. She drives x percent of the distance at 60 miles per hour and the remainder at 30 miles per hour. If Martha's average speed for the entire trip is represented as a fraction in its reduced form, in terms of x, which of the following is the numerator?
Pick:  A) 18,000  B) 300  C) 1,100  D) 3,000  E) 30,000
total distance = d   total time taken = x/(100*60) + (100-x)/(100*30)   speed = distance / time   gives numerator = 18000   18,000nswer : 18,000
<result>A</result>
Martha takes a road trip from point A to point B. She drives x percent of the distance at 60 miles per hour and the remainder at 30 miles per hour. If Martha's average speed for the entire trip is represented as a fraction in its reduced form, in terms of x, which of the following is the numerator?