Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions

Students in a class

Expert replies
by gibran » Fri May 23, 2008 9:34 am
The diagram attached shows the number of students in a certain high school class who are boys and the number of students in the class who are studying biology. What is the total number of students in the class?
(1) Of the boys in the class, 15 are studying biology.
(2) The number of girls in the class is twice the number of students in the class who
are not studying biology.
A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is
sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.
You do not have the required permissions to view the files attached to this post.
Join the discussion
Source: — Data Sufficiency |

by aatech » Fri May 23, 2008 10:22 am
IMO C

Stmt 1 gives you no of girls studying biology and no of boys not studying biology - NOT SUFF

Stmt 2 - tells total no of girls is twice the no of students not studying biology - NOT SUFF

Together, plug the nos in the table and unknowns can ba calculated easily

OA?
Join the discussion

by vittalgmat » Tue May 27, 2008 11:40 pm
aatech wrote:IMO C

Stmt 1 gives you no of girls studying biology and no of boys not studying biology - NOT SUFF

Stmt 2 - tells total no of girls is twice the no of students not studying biology - NOT SUFF

Together, plug the nos in the table and unknowns can ba calculated easily

OA?
I think it is B.

From B u will get an equation
26+x = 18 +2x.
So x = 6.
Total = 26 +x = 32. Solved

rgds
-Vittal
Join the discussion

by netigen » Wed May 28, 2008 2:05 am
B is the answer as described above.
Join the discussion