Target Test Prep 20% Off Flash Sale is on! Code: FLASH20

Redeem
Target Test Prep
5-Day Free Trial
5-day free, full-access trial TTP

Available with Beat the GMAT members only code

MORE DETAILS
Target Test Prep
Magoosh
Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

MORE DETAILS
Magoosh

Learn when to “Add� and “Multiply� in P & C

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 645
Joined: Mon Jul 26, 2010 12:42 pm
Location: US
Thanked: 527 times
Followed by:227 members

Learn when to “Add� and “Multiply� in P & C

by e-GMAT » Tue Apr 10, 2018 12:14 am
Learn when to "Add" and "Multiply" in Permutation & Combination questions- Exercise Question #2

A traffic signal has 4 colors: Red, Blue, Green, and Yellow. Signals are made by combining any 2 of these 4 colors. How many unique signals can the traffic signal show if the order of the colors defines unique cases?


A) 3
B) 6
C) 8
D) 12
E) 24

Learn to use the Keyword Approach in Solving PnC question from the following article:

Learn when to "Add" and "Multiply" in Permutation & Combination questions


Detailed solution will be posted soon.
Top
Post new topic Post Reply
• Page 1 of 1