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DI Set #3-number of televisions per household

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Director
Director
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Joined: 16 May 2014
Posts: 599
GRE 1: 326 Q165 V161
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Kudos [?]: 301 [0], given: 64

DI Set #3-number of televisions per household [#permalink] New post 31 Aug 2014, 22:45
Expert's post






No. of TelevisionsPercentage of Households
016%
18%
224%
320%
420%
5 or more12%


What is the median number of televisions per household?
A) Cannot be determined
B) 1
C) 2
D) 2.5
E) 3

What is the average (arithmetic mean) number of televisions per household?
A) Cannot be determined
B) 2.1
C) 2.3
D) 2.5
E) 2.7

If k is the number of households with exactly 2 televisions, then the number of households with exactly 4 televisions is-
A) k-4
B) 2k
C) k/100-4
D) 5k/6
E) 500k/6
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Re: DI Set #3-number of televisions per household [#permalink] New post 31 May 2016, 21:12
1)E
2)A
3)D
QA'z plzz
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Re: DI Set #3-number of televisions per household [#permalink] New post 22 Jun 2017, 03:17
Can anyone explain the question no 3.
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Re: DI Set #3-number of televisions per household [#permalink] New post 26 Sep 2017, 07:33
Q.3

k = 24% of X
n° of households with 4 TV = 20% of X

Thus, in terms of k, n*of households with 4 TV comes from k = 0.24X, then X= \frac{k}{0.24}.

Substituting X into the second statement, we get 0.2*\frac{k}{0.24}=\frac{5}{6}k
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DI Set #3-number of televisions per household

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