Statistics.

This topic has expert replies
Moderator
Posts: 772
Joined: Wed Aug 30, 2017 6:29 pm
Followed by:6 members

Statistics.

by BTGmoderatorRO » Sat Nov 11, 2017 8:45 am
Set A consists of integers -9, 8, 3, 10, and J; Set B consists of integers -2, 5, 0, 7, -6, and T. If R is the median of Set A and W is the mode of set B, and R^W is a factor of 34, what is the value of T if J is negative?

(A) -2
(B) 0
(C) 1
(D) 2
(E) 5

OA is b

I cannot really get the mathematical approach to this question. can any expert help me out?
Thanks in advance for your help

User avatar
Legendary Member
Posts: 2663
Joined: Wed Jan 14, 2015 8:25 am
Location: Boston, MA
Thanked: 1153 times
Followed by:128 members
GMAT Score:770

by DavidG@VeritasPrep » Mon Nov 13, 2017 1:23 pm
Roland2rule wrote:Set A consists of integers -9, 8, 3, 10, and J; Set B consists of integers -2, 5, 0, 7, -6, and T. If R is the median of Set A and W is the mode of set B, and R^W is a factor of 34, what is the value of T if J is negative?

(A) -2
(B) 0
(C) 1
(D) 2
(E) 5

OA is b

I cannot really get the mathematical approach to this question. can any expert help me out?
Thanks in advance for your help
Set A: -9, J, 3, 8, 10,. We know R is the median here; We're dealing with a scenario in which J is negative, so 3, must be the median.
If R^W is a factor of 34, then W must be 0, as 3 is itself not a factor of 34.

Set B: -6, -2, 0, 5, 7, and T. If the mode of set B is W, and W = 0, then T has to be 0. The answer is B
Veritas Prep | GMAT Instructor

Veritas Prep Reviews
Save $100 off any live Veritas Prep GMAT Course

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 7242
Joined: Sat Apr 25, 2015 10:56 am
Location: Los Angeles, CA
Thanked: 43 times
Followed by:29 members

by Scott@TargetTestPrep » Sat Oct 26, 2019 7:37 am
BTGmoderatorRO wrote:Set A consists of integers -9, 8, 3, 10, and J; Set B consists of integers -2, 5, 0, 7, -6, and T. If R is the median of Set A and W is the mode of set B, and R^W is a factor of 34, what is the value of T if J is negative?

(A) -2
(B) 0
(C) 1
(D) 2
(E) 5

OA is b

I cannot really get the mathematical approach to this question. can any expert help me out?
Thanks in advance for your help
Since J is negative, the median of the set A is 3; thus, R = 3.

We are told that R^W = 3^W is a factor of 34 = 2 * 17; this is only possible if W = 0.

Finally, since W = 0 is the mode of set B, there must be more than one occurrence of 0 in set B. Therefore, T must be 0.

Answer: B

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