Source: Official Guide for GMAT Review 2016 Data Sufficiency ; #10
John Robertson
Using the Manhattan Prep thing- A D B C E
Question: Find 10% of y
1) 5% of y is 60 .05y=60 -> can solve for y, and can then solve for 10% of y, .1y=____ SUFF (leaves A, D, cross out BCE)
2) y is 80% of 1500 y=.8*1500 -> can solve for y, and then solve for 10% of y SUFF (Cross out A, just leaves D)
Final Answer: D, both alone sufficient
Dec 29, 2016 • Comment
Sam Kinsman
Perfect! Keep up the good work, John, and thanks for sharing :D
Dec 30, 2016 • Reply
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