dave13 wrote:

duahsolo wrote:

If seven times m is equivalent to both three times n and 2 times p, what is the value of m + n + p?

(1) m – n = –4

(2) n + p = 5

can someone please provide a detailed silotion ?

statement 1: we have two unknowns m – n = –4

statement 2: again two unknowns n + p = 5

haw can D be correct answer ?

hey

pushpitkc how are you ?

havent seen you around lately

Hey

PKN maybe you can help ?

Hi

dave13,

You have mentioned the info(equation) that is provided in st1 and st2.

What about the info(equation) provided in the question?? Why did you ignore it?

Given,

seven times m is equivalent to both three times n and 2 times p1) 7 times m=3 times n ; or, 7m=3n--------------(1)

2) 7 times m=2 times p; or, 7m=2p--------------(2)

3) combine eq(1) & (2); 7m=3n=2p------------- --(3)

st1:-

m – n = –4-----------(4)

Equation (1) and (4), we have 2 equations and 2 variables. I am sure we can determine the value of variables(m & n) by substitution method. Again, using eq(3), we can determine the value of p. Now, (m+n+p) can be determined.No need of computation.

Sufficient.

st2:-

n + p = 5-----------(5)

Equation (3)(3n=2p) and (5), we have 2 equations and 2 variables. I am sure we can determine the value of variables(n & p) by substitution method. Again, using eq(3), we can determine the value of m. Now, (m+n+p) can be determined.No need of computation.

Ans. (D)

_________________

Regards,

PKN

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