Source: Official Guide for GMAT Review 2016 Data Sufficiency ; #10

1

What is the value of 10 percent of

What is the value of 10 percent of y?

1 Explanation

1

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, Magoosh Tutor

Perfect! Keep up the good work, John, and thanks for sharing :D

Dec 30, 2016 • Reply

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Official GMAT Material

Official Guide for GMAT Review 2016

Official Guide for the GMAT 2015 14th Ed.

Official Guide for the GMAT 13th Ed.

Nova's GRE Prep

Official Guide for the GMAT 12th Ed.

Revised GRE PDF 2nd Ed.


Section 6.3 Data Sufficiency

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