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# DI Set #3-number of televisions per household

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Director
Joined: 16 May 2014
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DI Set #3-number of televisions per household [#permalink]  31 Aug 2014, 22:45
Expert's post

 No. of Televisions Percentage of Households 0 16% 1 8% 2 24% 3 20% 4 20% 5 or more 12%

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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Manager
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Re: DI Set #3-number of televisions per household [#permalink]  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]  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]  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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