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500 PS #5

This topic has 1 expert reply and 5 member replies

500 PS #5

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Hello

The answer is E) but my answer for French fries was $1.62.... Can anyone explain?


At a certain diner, a hamburger and coleslaw cost $3.59, and a hamburger and french fries cost $4.40. If french fries cost twice as much as coleslaw, how much do french fries cost?
(A) $0.30
(B) $0.45
(C) $0.60
(D) $0.75
(E) $0.90

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Let the price of coleslaw be C
Then price of french fries is 2*C (given)
Let the price of Hamburger be H

now H+C=3.59
H+2C= 4.40

which gives C= 0.81
And price of French fries = 2*C =1.62

There is nothing wrong with your solution if the question is the same

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So, do you think the answer E) is wrong?? I am confused.. Crying or Very sad

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dunkin77 wrote:
So, do you think the answer E) is wrong?? I am confused.. Crying or Very sad
E is wrong if the question is exactly like what you have posted

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Okay - thanks for the confirmation!

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let the cost of a hamburger be 'ham', the cost of a fresh fries be 'fri' and the cost of coleslaw be 'col'.
from the question,
ham + col= $3.59 ------(i)
ham + fri= $4.40 ---------(ii)
fri= 2*col.= 2col --------(iii)
from i, ham = $3.59- col
from ii, ham = $4.40-fri
since the price of ham in both is the same, then
ham= 3.59-col = 4.40-fri
3.59-col = 4.40 - fri
fri-col = 0.81
but from equation iii, col= fri/2
therefore,
$$fri-\frac{fri}{2}=0.81$$
$$2fri-fri=1.62$$
$$fri=1.62$$
$$Therefore,\ french\ fries\ \cos t=$1.62$$

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dunkin77 wrote:
Hello

The answer is E) but my answer for French fries was $1.62.... Can anyone explain?


At a certain diner, a hamburger and coleslaw cost $3.59, and a hamburger and french fries cost $4.40. If french fries cost twice as much as coleslaw, how much do french fries cost?
(A) $0.30
(B) $0.45
(C) $0.60
(D) $0.75
(E) $0.90
Hi dunkin77,

The correct answer is $1.62.
Answer choices seems incorrect.

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