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A bookstore stocks 1/5 of its books as fiction works, and 1/3 less tha

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Math Expert
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A bookstore stocks 1/5 of its books as fiction works, and 1/3 less tha  [#permalink]

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New post 31 Oct 2018, 02:24
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

65% (01:47) correct 35% (01:31) wrong based on 72 sessions

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Re: A bookstore stocks 1/5 of its books as fiction works, and 1/3 less tha  [#permalink]

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New post 01 Nov 2018, 13:17
Fiction = 1/5
Self help = (1/5) - (1/3)*(1/5) = (1/5) - (1/15) = 2/15

Total asked = 2/15 + 1/5 = 1/3

Option E
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Re: A bookstore stocks 1/5 of its books as fiction works, and 1/3 less tha  [#permalink]

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New post 01 Nov 2018, 20:12
Bunuel wrote:
A bookstore stocks 1/5 of its books as fiction works, and 1/3 less than the fiction books as self-help books. What fraction of the total books are the fiction and self-help books?


A. 3/5
B. 11/30
C. 4/15
D. 2/15
E. 1/3


Let total number of books be \(= 30\)

Fiction books \(= \frac{1}{5}\) of total books \(= \frac{1}{5} * 30 = 6\)

Self help books \(=\) fiction books \(-\) \(\frac{1}{3}\) of fiction books \(= 6 - \frac{1}{3}* 6 = 6 - 2 = 4\)

Total number of fiction books and self help books \(= 6 + 4 = 10\)

Hence the fraction of fiction and self-help books to the total books \(= \frac{10}{30} = \frac{1}{3}\)

Answer E
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Re: A bookstore stocks 1/5 of its books as fiction works, and 1/3 less tha  [#permalink]

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New post 02 Nov 2018, 17:07
Bunuel wrote:
A bookstore stocks 1/5 of its books as fiction works, and 1/3 less than the fiction books as self-help books. What fraction of the total books are the fiction and self-help books?


A. 3/5
B. 11/30
C. 4/15
D. 2/15
E. 1/3


We can let n = the total number of books and create the equations:

n/5 = fiction

and

n/5 x 2/3 = 2n/15 = self-help

Thus, fiction and self-help books are n/5 + 2n/15 = 3n/15 + 2n/15 = 5n/15 = n/3.

Answer: E
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Re: A bookstore stocks 1/5 of its books as fiction works, and 1/3 less tha   [#permalink] 02 Nov 2018, 17:07
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