John and Terry are standing in a queue with Terry in front of John. Ho

Question

John and Terry are standing in a queue with Terry in front of John. How many people are between John and Terry?

(1) There are 28 people behind Terry.
(2) There are 24 people in front of John.

Bunuel · Answer

This is a copy of the following questions: https://gmatclub.com/forum/pam-and-ed-a ... 98651.html https://gmatclub.com/forum/how-many-peo ... 18883.html https://gmatclub.com/forum/how-many-peo ... 54868.html

rajatchopra1994 · Answer

Explanation:

Given: Terry in front of John. 
To find : People between John and Terry?

Statement 1: There are 28 people behind Terry.
we can't find how many are between John & terry from above statement.
Not Sufficient.

Statement 2: There are 24 people in front of John.
we can't find how many are between John & terry from above statement.
Not Sufficient.

From 1 & 2,
Still Between John & terry, there can be different number of People.
Not Sufficient

IMO-E

zhangwma · Answer

Information from Question Stem & Set up   
(Front)-----Terry ------?------ John------(Back)

I assigned variables to see if it was possible to obtain just the middle value. 
 From the starting position to Terry = x, 
 the people in between = y, 
 from John to the last position in line = z

(Front)--x---Terry ------y------ John---z---(Back)

We can derive an incomplete equation of  x + y + z = T  (where T is the total number of people in the line)

Target Question: y = ?

Analyze Statements  
1) Equation: x + y = 24 ==> INSUFFICIENT
2) Equation: y + z = 28 ==> INSUFFICIENT

Combined) We have two unique equations but that's still an insufficient number of equations/information to solve.

To elaborate: y = 24 - x = 28 - z --> we'd still be left with x and z in the equation  ==> INSUFFICIENT

Answer E

John and Terry are standing in a queue with Terry in front of John. Ho

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GMAT Data Sufficiency (DS) Questions

John and Terry are standing in a queue with Terry in front of John. Ho

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