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The ratio of pines to magnolias in a nursery is 10:2. If the sum of th

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The ratio of pines to magnolias in a nursery is 10:2. If the sum of th  [#permalink]

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New post 14 Mar 2018, 21:23
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

95% (00:50) correct 5% (00:27) wrong based on 59 sessions

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Re: The ratio of pines to magnolias in a nursery is 10:2. If the sum of th  [#permalink]

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New post 14 Mar 2018, 21:57
Lets assume P=10X and M=2X
P+M = 12X
NOW 12X =108
X = 9
2X=18 = M (C)
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Re: The ratio of pines to magnolias in a nursery is 10:2. If the sum of th  [#permalink]

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New post 18 Mar 2018, 12:28
First: 10+2=12 total flowers
Second: 12 goes into 108: 9 times
Third: 9*2=18

Answer C
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Re: The ratio of pines to magnolias in a nursery is 10:2. If the sum of th  [#permalink]

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New post 20 Mar 2018, 02:56
1/6*108=18

Hence C
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Re: The ratio of pines to magnolias in a nursery is 10:2. If the sum of th  [#permalink]

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New post 20 Mar 2018, 08:36
Let number of pines = 10x
................ magnolias= 2x

10x+2x= 108
12x= 108

x= \(\frac{108}{12}\)= 9

No of magnolias= 2x= 2*9= 18

\(Answer: C.\)
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Re: The ratio of pines to magnolias in a nursery is 10:2. If the sum of th  [#permalink]

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New post 20 Mar 2018, 08:53
Bunuel wrote:
The ratio of pines to magnolias in a nursery is 10:2. If the sum of the number of pines and magnolias in the nursery is 108, how many magnolias are in the nursery?

A, 9
B. 11
C. 18
D. 20
E. 54

\(\frac{108}{(10 + 2 )}*2\)

= 18, Answer must be (C)
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Re: The ratio of pines to magnolias in a nursery is 10:2. If the sum of th  [#permalink]

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New post 20 Mar 2018, 15:21
Total magnolias = (\(\frac{magnolias}{pines+magnolias}\)) * Total (magnolias+pines)=\(\frac{2}{(10+2)}\) * 84 = 18.
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Re: The ratio of pines to magnolias in a nursery is 10:2. If the sum of th  [#permalink]

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New post 21 Mar 2018, 16:12
Bunuel wrote:
The ratio of pines to magnolias in a nursery is 10:2. If the sum of the number of pines and magnolias in the nursery is 108, how many magnolias are in the nursery?

A, 9
B. 11
C. 18
D. 20
E. 54


We can create the ratio pines : magnolias = 10x : 2x, and thus:

10x + 2x = 108

12x = 108

x = 9

Thus, there are 2 x 9 = 18 magnolias in the nursery.

Answer: C
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Re: The ratio of pines to magnolias in a nursery is 10:2. If the sum of th   [#permalink] 21 Mar 2018, 16:12
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