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07 Jul 2016, 06:07
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
13% (01:23) correct
88%
(01:24)
wrong
based on 16
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The price of a pasta box in the neighborhood grocery store is $7; the price of a pasta box in the market is $5. A bus ticket to the market costs $4.70 (one way). What is the minimum number of pasta boxes that must be bought so the trip would be economically worthwhile?
A. 3.
B. 4.
C. 5.
D. 6.
E. 7.
A. 3.
B. 4.
C. 5.
D. 6.
E. 7.
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07 Jul 2016, 12:51
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Bunuel
Given the box from grocery is 7$ and from market 5$.
The total round trip home to market and back will be 4.7 * 2 = 9.4 $.
Lets go options wise.
Qrocery
3*7 = 21 (Option * grocery price )
4*7 = 28
5*7 = 35
6*7 = 42
7*7 = 49
Market ((Option * Market price ) + journey
3*5 + 9.4 = 24.4 = 24 ( rounded to nearest whole number)
4*5 + 9.4 = 29.4 = 29
5*5 + 9.4 = 34.4 = 34
6 *5 + 9.4 = 39.4 = 39
7*5 + 9.4 = 44.4 = 44
Difference ( just checking which one will yield better result if there is a difference )
24 - 21 = 4 ( total market expenses - grocery) or ( grocery - M P )
29 - 28 = 1
35 - 34 = 1
42 - 39 = 3
49 - 44 = 5
But observe options B and C are nearest to 1. Now subtracting without rounding.
so, 29.4 - 28 = 1.6 and 35 - 34.4 = 0.6
So, the best option would be 5 boxes...Option C.
OA please... Will correct if I missed anything.
07 Jul 2016, 14:45
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if you used break even analysis
price to buy x boxes of pasta at the grocery store = 7x
price to buy x boxes in market = 5x
for market you spend 4.70 * 2 (round trip)
equate the two
7x = 5x + 9.40
or x = at least 4.7 boxes to break even
so 5 is my answer.
price to buy x boxes of pasta at the grocery store = 7x
price to buy x boxes in market = 5x
for market you spend 4.70 * 2 (round trip)
equate the two
7x = 5x + 9.40
or x = at least 4.7 boxes to break even
so 5 is my answer.
