GMAT Question of the Day (Aug 15): Combinations and Critical Reasoning

By - Aug 15, 02:00 AM Comments [0]

Math (PS)

10 business executives and 7 chairmen meet at a conference. If each business executive shakes the hand of every other business executive and every chairman once, and each chairman shakes the hand of each of the business executives but not the other chairmen, how many handshakes would take place?

(A) 144
(B) 131
(C) 115
(D) 90
(E) 45

Question Discussion & Explanation
Correct Answer - C - (click and drag your mouse to see the answer)

GMAT Daily Deals
  • Veritas Prep has worked with over 50K students at over 90 locations worldwide. Save $835 at GMAT Club. Details!
  • Manhattan Review: presenting the GMAT content in a coherent and concise manner. Save 20% @ GMAT Club! Find out more.
  • MBA Prep School: Essay & Resume Editing, Mock Interview & Regular Admit Consult. Full service, full savings. Use the GMAT Club code and save up to $500!
  • MBA Admit Consulting: Save with 2-For-1 Gold Package Application Special. Only at GMAT Club. Learn more!

Verbal (CR)

Identical twins tend to have similar personalities; if environment outweighs heredity in personality development, twins raised together should presumably have more similar personalities than those raised apart. A recent study of identical twins in both situations measured 11 key traits through a questionnaire, and concluded that 7 of the 11 are primarily products of heredity.

Which of the following, if established, would cast the most doubt on the study's results?

(A) Fewer than half of the pairs of twins studied were raised separately.
(B) The ages of all of the twins studied fell within a 10-year range.
(C) Some of the traits that the study attributed to heredity developed in the separately raised twins because those pairs all grew up in similar families.
(D) Although over half the traits measured were determined to be linked to heredity, the nature of those traits varied widely.
(E) The 11 traits that were measured constitute a representative sample of larger, generally accepted pool of key personality traits.

Question Discussion & Explanation
Correct Answer - C - (click and drag your mouse to see the answer)

Like these questions? Get the GMAT Club question collection: online at GMAT Club OR on your Kindle OR on your iPhone/iPad

Browse all GMAT Questions of the Day

Subscribe to GMAT Question of the Day: E-mail | RSS

[0] Comments to this Article

Comments are closed.