GMAT Quantitative Reasoning Practice Test 1

Question : 48 of 100

Marks: +1, -0

Scott's average (arithmetic mean) golf score on his first four rounds was 78. What score does he need on his fifth round to drop his average score by 2 points?

Validate

Solution:

If the average of four rounds is 78 , then the total points scored is

78 × 4=312

. If his score were to drop 2 points that means his new average would be 76 . A 76 average for five rounds is a total of 380 points. The difference between these two point totals is

380-312=68

. He needs a score of 68 on the fifth round.

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