GMAT Challenge Question
This week’s GMAT challenge from PrepForTests.com is a problem solving question.
Mary walked from home to work in the morning at an average speed of 3mph. She returned in the evening taking the same route running an average speed of 6mph. What was her average speed for the whole journey to and from work?
- 3.5 mph
- 4 mph
- 4.5 mph
- 5 mph
- 5.5 mph
Have a go at answering this and then review your answer.
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