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# In a certain group of people, some own Ferrari, others

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SVP
Joined: 03 Feb 2003
Posts: 1609
Followers: 6

Kudos [?]: 75 [0], given: 0

In a certain group of people, some own Ferrari, others [#permalink]  26 Sep 2003, 01:49
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Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
In a certain group of people, some own Ferrari, others Lamborghini, and still others both. 60% of the people own Ferrari. What percentage of the people owns Lamborghini?

(1) 60% own Ferrari, and of those 10% own Lamborghini as well.
(2) 40% own Lamborghini only.
Senior Manager
Joined: 21 Aug 2003
Posts: 258
Location: Bangalore
Followers: 1

Kudos [?]: 4 [0], given: 0

n(ForL) = n(F) + n(L) - n(F&L) ------ a
Given: n(F) = 60, assume total people =100
to find: n(L) =?
1) n(F&L)=0.1*60 = 6
Two unknown in eq a---- (note we still dont know n(ForL)...) Here i assume that there may be people who own neither F nor L.
Unsuffecient.
2) n(L) - n(F&L) = 40
Not suffecient to find n(L).

Both 1 & 2 gives n(L) = 46%

Stolyar, kindly confirm.
SVP
Joined: 03 Feb 2003
Posts: 1609
Followers: 6

Kudos [?]: 75 [0], given: 0

A is correct, for there are no people owning neither—it is followed from the initial verbiage: some—others—still others mean a complete list of people.
CEO
Joined: 15 Aug 2003
Posts: 3469
Followers: 61

Kudos [?]: 701 [0], given: 781

Re: DS: FERRARI [#permalink]  26 Sep 2003, 16:41
stolyar wrote:
In a certain group of people, some own Ferrari, others Lamborghini, and still others both. 60% of the people own Ferrari. What percentage of the people owns Lamborghini?

(1) 60% own Ferrari, and of those 10% own Lamborghini as well.
(2) 40% own Lamborghini only.

Stolyar, where'd you get this one...more like a SC than a DS
SVP
Joined: 03 Feb 2003
Posts: 1609
Followers: 6

Kudos [?]: 75 [0], given: 0

I invented it. Long, long time ago I exhausted my pack of interesting questions and since then I have invented them.
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