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laptop problem

by pradeepkaushal9518 » Fri Apr 16, 2010 8:01 am
At a technology consulting firm with x computers, all of which are desktops or laptops, 30% are laptops; if 80% of the total number of computers have more than 1GB of RAM and 10% of the computers with less than 1GB of RAM are laptops (and no computers have exactly 1GM of RAM), approximately what percent of the desktops have more than 1GB of RAM?

A) 75%
B) 60%
C) 52%
D) 40%
E) 45%

plz answer
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by liferocks » Fri Apr 16, 2010 9:04 am
pradeepkaushal9518 wrote:At a technology consulting firm with x computers, all of which are desktops or laptops, 30% are laptops; if 80% of the total number of computers have more than 1GB of RAM and 10% of the computers with less than 1GB of RAM are laptops (and no computers have exactly 1GM of RAM), approximately what percent of the desktops have more than 1GB of RAM?

A) 75%
B) 60%
C) 52%
D) 40%
E) 45%

plz answer
let us consider there are total 100 computers
from the data we get
number of laptops--30
number of desktops--70

number of computers with >1gb ram--80
number of computers with <1gb ram--20--10% of these are laptop so 2 are laptops hence laptops with more than 1GB ram
are(30-2) or 28
number of desktops with more than 1GB ram (80-28) or 52

hence the percentage of the desktops with more than 1GB of RAM is (52/70)x100 or approx 75%
ans A
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by analyst218 » Fri Apr 16, 2010 9:13 am
pradeepkaushal9518 wrote:At a technology consulting firm with x computers, all of which are desktops or laptops, 30% are laptops; if 80% of the total number of computers have more than 1GB of RAM and 10% of the computers with less than 1GB of RAM are laptops (and no computers have exactly 1GM of RAM), approximately what percent of the desktops have more than 1GB of RAM?

A) 75%
B) 60%
C) 52%
D) 40%
E) 45%

plz answer
A
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by pradeepkaushal9518 » Fri Apr 16, 2010 9:56 am
thanks life rocks

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by Scott@TargetTestPrep » Sun Dec 22, 2019 7:26 pm
pradeepkaushal9518 wrote:At a technology consulting firm with x computers, all of which are desktops or laptops, 30% are laptops; if 80% of the total number of computers have more than 1GB of RAM and 10% of the computers with less than 1GB of RAM are laptops (and no computers have exactly 1GM of RAM), approximately what percent of the desktops have more than 1GB of RAM?

A) 75%
B) 60%
C) 52%
D) 40%
E) 45%

plz answer

If we let x = 100, we have 30 laptops and 70 desktops. Furthermore, 80 computers have more than 1GB of RAM, and 20 computers have less than 1GB of RAM.

Therefore, 20 x 0.1 = 2 are laptops with less than 1GB of RAM, and 18 are desktop with less than 1 GB of RAM. Since there are 70 desktops, 70 - 18 = 52 desktops have more than 1 GB of RAM. So 52/70 x 100 ≈ 75 percent of the desktops have more than 1 GB Of RAM.

Answer: A

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