BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

How many passengers can be seated on a plane with r rows, if

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Moderator
Posts: 2599
Joined: Sun Oct 29, 2017 2:08 pm
Followed by:2 members

by AAPL » Thu Mar 29, 2018 10:49 am
Hi BTGmoderatorRO,

'd' double seats means number of passengers which can sit = d*2 = 2d
and 't' triple seats means number of passengers which can sit = t*3 = 3t
Thus in each row, number of passengers which can be seated = 2d + 3t

In 'r' rows total = r* (2d + 3t) = 2dr + 3tr

Hence option C is the correct answer. Regards!
Top

GMAT/MBA Expert

User avatar
Elite Legendary Member
Posts: 10392
Joined: Sun Jun 23, 2013 6:38 pm
Location: Palo Alto, CA
Thanked: 2867 times
Followed by:511 members
GMAT Score:800

by [email protected] » Thu Mar 29, 2018 3:15 pm
Hi All,

We're told that a plane contains R rows, each of which consists of D double seats and T triple seats. We're asked for the number of seats on the plane. This question can be solved by TESTing VALUES.

IF....
R=2, D=3 and T=4, then there are 2 rows with 3(2) + 4(3) = 6+12 = 18 seats in each row.
With 2 rows, that is 2(18) = 36 total seats

There's only one answer that matches...

Final Answer: C

GMAT assassins aren't born, they're made,
Rich
Contact Rich at [email protected]
Image
Top

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 8086
Joined: Sat Apr 25, 2015 10:56 am
Location: Los Angeles, CA
Thanked: 43 times
Followed by:29 members

by Scott@TargetTestPrep » Fri Mar 30, 2018 11:14 am
BTGmoderatorRO wrote:How many passengers can be seated on a plane with r rows, if each row consists of d double seats and t triple seats?

(A) rdt

(B) rd + rt

(C) 2dr + 3tr

(D) 3dr + 2tr

(E) rd + t
The number of people who can be seated is r(2d + 3t) = 2dr + 3tr.

Answer: C

Scott Woodbury-Stewart
Founder and CEO
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

ImageImage
Top
Post new topic Post Reply
• Page 1 of 1