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What is the average of 1/2, 2/5 and 3/10?

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Math Expert
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What is the average of 1/2, 2/5 and 3/10?  [#permalink]

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New post 24 Mar 2016, 02:53
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

86% (00:50) correct 14% (00:51) wrong based on 49 sessions

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Re: What is the average of 1/2, 2/5 and 3/10?  [#permalink]

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New post 24 Mar 2016, 05:27
Sum of 1/2,2/5 & 3/10 =12/10
Average = 12/10*1/3 =2/5
Answer C 2/5


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Re: What is the average of 1/2, 2/5 and 3/10?  [#permalink]

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New post 24 Mar 2016, 06:19
Bunuel wrote:
What is the average of 1/2, 2/5 and 3/10?

A. 1/5
B. 3/10
C. 2/5
D. 1/2
E. 6/5


Another way to look at it is..
the fractions in ascending order= 3/10, 2/5,1/2

so average will be>3/10.. so A and B can be eliminated

Also average < 1/2.. so D and E can be eliminated


ONLY C is left
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Re: What is the average of 1/2, 2/5 and 3/10?  [#permalink]

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New post 25 Mar 2016, 02:18
Bunuel wrote:
What is the average of 1/2, 2/5 and 3/10?

A. 1/5
B. 3/10
C. 2/5
D. 1/2
E. 6/5



1/2=0.5
2/5=0.4
3/10=0.3

3 consecutive numbers so median= average=0.4=2/5

Answer C
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Re: What is the average of 1/2, 2/5 and 3/10?  [#permalink]

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New post 19 Jun 2017, 06:56
Bunuel wrote:
What is the average of 1/2, 2/5 and 3/10?

A. 1/5
B. 3/10
C. 2/5
D. 1/2
E. 6/5


Notice that a common denominator can be set up rather quickly- 5/10, 4,10 , 3,10 - just take the average of the numerator - 5 + 4 + 3 /3 = 4/10 = 2/5


Thus

"C"
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Re: What is the average of 1/2, 2/5 and 3/10?  [#permalink]

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New post 19 Jun 2017, 09:30
Bunuel wrote:
What is the average of 1/2, 2/5 and 3/10?

A. 1/5
B. 3/10
C. 2/5
D. 1/2
E. 6/5


\(\frac{1}{2}\), \(\frac{2}{5}\) and \(\frac{3}{10}\) = \(\frac{5}{10}\) , \(\frac{4}{10}\) , \(\frac{3}{10}\)

Thus, average is \(\frac{5+4+3}{10*3}\) = \(\frac{2}{5}\)

Thus, answer will be (C)
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Re: What is the average of 1/2, 2/5 and 3/10?  [#permalink]

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New post 21 Sep 2019, 12:28
Bunuel wrote:
What is the average of 1/2, 2/5 and 3/10?

A. 1/5
B. 3/10
C. 2/5
D. 1/2
E. 6/5


The average is:

(1/2 + 2/5 + 3/10)/3

Multiplying the entire expression by 10/10, we have:

(5 + 4 + 3)/30 = 12/30 = 2/5

Answer: C
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Re: What is the average of 1/2, 2/5 and 3/10?   [#permalink] 21 Sep 2019, 12:28
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