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Difficulty:
15%
(low)
Question Stats:
90% (01:00) correct
10%
(01:15)
wrong
based on 70
sessions
History
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If a computer dealer sold a few desktop computers and a few laptop computers, what was the average (arithmetic mean) sale price for all the computers that were sold by the dealer last month?
(1) The average sale price for the desktop computers that were sold by the dealer last month was $800.
(2) The average sale price for the laptop computers that were sold by the dealer last month was $1,100.
_________________
(1) The average sale price for the desktop computers that were sold by the dealer last month was $800.
(2) The average sale price for the laptop computers that were sold by the dealer last month was $1,100.
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Number of desktop computers = n and average price= D
Number of laptop computers = m and average price= L
Average = (nD+mL)/(n+m) = ?
(1) Average = D = 800
Don't know about L, m,n
Insufficient
(2) Average = L =1100
Don’t know about m,n,D
Insufficient
(1)&(2) We don’t know about values of m & n.
Insufficient
E
Number of laptop computers = m and average price= L
Average = (nD+mL)/(n+m) = ?
(1) Average = D = 800
Don't know about L, m,n
Insufficient
(2) Average = L =1100
Don’t know about m,n,D
Insufficient
(1)&(2) We don’t know about values of m & n.
Insufficient
E
samarpan.g28
Joined: 08 Dec 2023
Last visit: 18 Feb 2026
Posts: 310
Location: India
Concentration: General Management, Human Resources
GPA: 8.88
WE:Engineering (Technology)
Posts: 310
To calculate the overall average price, we need both the individual average prices and the quantities sold for each type of computer. The statements only provide the prices, without any information about quantities.
Therefore, Statements (1) and (2) are insufficient on their own, and even when combined.
Options A, B, and C are eliminated, and the correct answer is E.
Therefore, Statements (1) and (2) are insufficient on their own, and even when combined.
Options A, B, and C are eliminated, and the correct answer is E.
Souradeep17
Joined: 01 May 2025
Last visit: 20 Apr 2026
Posts: 328
Location: India
Concentration: Technology, Strategy
GMAT Focus 1: 605 Q80 V79 DI81 
GPA: 9.4
WE:Information Technology (Computer Software)
GMAT Focus 1: 605 Q80 V79 DI81
Posts: 328
We need to find the average of sale price for all the computers (Desktop and laptop)
Option 1:
Desktop average price is 800$ from here we don't know anything about the laptops So not sufficient.
Option 2:
Laptop's average is 1100. From here we don't know about desktop hence not sufficient .
Option 1+2:
we know about the individual averages but we are not given any information about the quantity of each. Now the average changes if the quantity differs . So this is also not sufficient (option E)
Option 1:
Desktop average price is 800$ from here we don't know anything about the laptops So not sufficient.
Option 2:
Laptop's average is 1100. From here we don't know about desktop hence not sufficient .
Option 1+2:
we know about the individual averages but we are not given any information about the quantity of each. Now the average changes if the quantity differs . So this is also not sufficient (option E)
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