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A manufacturer produced x percent more video cameras in 1994 than in [#permalink]
16 Jun 2006, 21:35

1

This post received KUDOS

6

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

55% (hard)

Question Stats:

59% (02:14) correct
41% (01:23) wrong based on 257 sessions

A manufacturer produced x percent more video cameras in 1994 than in 1993 and y percent more in 1995 than in 1994. If the manufacturer produced 1,000 video cameras in 1993, how many video cameras did the manufacturer produce in 1995?

Re: A manufacturer produced x percent more video cameras in 1994 than in [#permalink]
06 Nov 2011, 21:21

1

This post received KUDOS

The question has one critical word missing. Am assuming as follows: A manufacturer produced x percent more video cameras in 1994 than in 1993 and y percent more in 1995 than in 1994. If he produced 1000 video cameras in 1993, how many did he produce in 1995?

Video cameras produced in 1995 = 1000 * (1+x/100) * (1+y/100) = 1000 * (1 + x/100 + y/100 + xy/10000) cameras = 1000 + 1000/100 (x + y + xy/100) cameras = 1000 + 10 (x + y + xy/100) cameras

Using statement (1), we know xy but not know x and y separately. Insufficient. Using statement (2), we know x + y + xy/100 and so can calculate the expression above. Sufficient.

Re: A manufacturer produced x percent more video cameras in 1994 than in [#permalink]
11 Sep 2013, 11:24

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Re: A manufacturer produced x percent more video cameras in 1994 than in [#permalink]
15 Sep 2014, 06:03

1

This post received KUDOS

I got E because of typo made in the question.

Original question :: A manufacturer produced x percent more video cameras in 1994 than in 1993 Typo :: A manufacturer produced x percent ____ video cameras in 1994 than in 1993

Bunuel please edit the question stem, it must be "x percent more" _________________

Piyush K ----------------------- Our greatest weakness lies in giving up. The most certain way to succeed is to try just one more time. ― Thomas A. Edison Don't forget to press--> Kudos My Articles: 1. WOULD: when to use?| 2. All GMATPrep RCs (New) Tip: Before exam a week earlier don't forget to exhaust all gmatprep problems specially for "sentence correction".

Re: A manufacturer produced x percent more video cameras in 1994 than in [#permalink]
15 Sep 2014, 19:42

Expert's post

PiyushK wrote:

I got E because of typo made in the question.

Original question :: A manufacturer produced x percent more video cameras in 1994 than in 1993 Typo :: A manufacturer produced x percent ____ video cameras in 1994 than in 1993

Bunuel please edit the question stem, it must be "x percent more"

Now the cameras in 1995 = 1000 + a + b = 1000 + 10x + 10y + xy/10 = 10(100+x+y+xy/100)

Now using stmt 2 we can solve the above equation hence Stmt 2 is sufficient and hence answer is B

Note from stmt 1 we wont know values of x and y

hey, i have a query. we substituted the value of "xy" in the equation and are left with two unknown variable x and y. Cant we substitute the value x=20/y also in the equation and make it a single variable equation? From that we can find the value of x and y separately.

gmatclubot

Re: A manufacturer produced x percent more video cameras in 1994 than in
[#permalink]
08 Jun 2015, 22:17