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What is the value of m − 3n?

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What is the value of m − 3n?  [#permalink]

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New post 13 Feb 2019, 10:06
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

69% (00:38) correct 31% (00:53) wrong based on 45 sessions

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What is the value of \(m − 3n\)?

(1) \(\frac{m}{2}\) - 8 = \(\frac{3n}{2}\)

(2) \(m\) = 10

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Re: What is the value of m − 3n?  [#permalink]

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New post 13 Feb 2019, 10:12
CAMANISHPARMAR wrote:
What is the value of \(m − 3n\)?

(1) \(\frac{m}{2}\) - 8 = \(\frac{3n}{2}\)

(2) \(m\) = 10



we are looking for m - 3n.

Statement 1: \(\frac{m}{2}\) - 8 = \(\frac{3n}{2}\)

\(\frac{m}{2}\) - \(\frac{3n}{2}\) = 8

\(\frac{m - 3n}{2}\)= 8

m - 3n = 16.

Sufficient.

Statement 2 : m = 10. clearly NOT sufficient. we don't know the value of n.

A is the correct answer.
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Re: What is the value of m − 3n?  [#permalink]

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New post 14 Feb 2019, 00:02

Solution



To find:
    • The value of the expression m – 3n

Analysing Statement 1
As per the information given in statement 1, \(\frac{m}{2} – 8 = \frac{3n}{2}\)

We can write this expression as:
    • \(\frac{m}{2} – 8 = \frac{3n}{2}\)
    Or, \(\frac{m}{2} – \frac{3n}{2} = 8\)
    Or, m – 3n = 8 x 2 = 16

Hence, statement 1 is sufficient to answer the question.

Analysing Statement 2
As per the information given in statement 2, m = 10.
    • However, from this statement, we cannot infer any information about the value of n.

Hence, statement 2 is not sufficient to answer the question.

Hence, the correct answer is option A.

Answer: A

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Re: What is the value of m − 3n?  [#permalink]

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New post 19 Feb 2019, 04:54
CAMANISHPARMAR wrote:
What is the value of \(m − 3n\)?

(1) \(\frac{m}{2}\) - 8 = \(\frac{3n}{2}\)

(2) \(m\) = 10


from 1)

{m - 16}/ 2 - 3n/2 = 0

m-16-3n = 0

m-3n = 16

sufficient A
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Re: What is the value of m − 3n?   [#permalink] 19 Feb 2019, 04:54
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