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Updated on: 14 Oct 2015, 09:50
Originally posted by harish1986 on 14 Oct 2015, 08:43.
Last edited by ENGRTOMBA2018 on 14 Oct 2015, 09:50, edited 1 time in total.
Last edited by ENGRTOMBA2018 on 14 Oct 2015, 09:50, edited 1 time in total.
Renamed the topic
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
80% (02:39) correct
20%
(02:52)
wrong
based on 363
sessions
History
Date
Time
Result
Not Attempted Yet
Nancy works 3 days per week at a rate of x dollars per day. If Nancy works more than 3 days per week, any extra days are paid at double her normal rate. Nancy worked 4 weeks with no overtime, and then worked 3 more weeks, each with y days of overtime. Which of the following represents Nancy’s total earnings over this period?
a) 3y(7x+2xy)
b) 3x+12y
c) 3xy(7x+2)
d) 3x(2y+7)
e) 4x(y+8)
a) 3y(7x+2xy)
b) 3x+12y
c) 3xy(7x+2)
d) 3x(2y+7)
e) 4x(y+8)
14 Oct 2015, 09:03
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harish1986
Payment of a week for 3 days a week = $3x
Payment of 4 weeks for 3 days a week = $3x*4 = $12x
Payment of a week for y days overtime a week = $3x+$2xy
Payment of 3 weeks for y days overtime a week = ($3x+$2xy)*3
Total Earnings = $12x + ($3x+$2xy)*3 = 21x+6xy =3x(2y+7)
Answer: option D
General Discussion
14 Oct 2015, 20:27
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Hi harish1986,
This question can also be solved by TESTing VALUES.
We're told that Nancy gets paid X dollars per day for a 3-day work week, but if it's an 'overtime' day (anything MORE than 3 days per week), then it's DOUBLE that (so 2X dollars per day). We're asked how much she was paid for 4 weeks with no overtime and 3 weeks with Y extra days per week of overtime.
Let's TEST....
X = 10
Y = 2
So Nancy gets paid $10 per day for 3 days during a normal week....that's $30 per week.
By working 2 extra days in a week, she gets paid the $30 for the first 3 days, then 2($20) for the extra 2 days....that's $70 for those weeks.
Over 4 regular weeks and 3 of these specific overtime weeks, she would make....
4($30) + 3($70) =
$120 + $210
$330
So we're looking for an answer that equals 330 when X=10 and Y=2...
Answer A) 3y(7x+2xy) = 3(2)(70+40) = 660 NOT a match
Answer B) 3x+12y = 3(10) + 12(2) = 54 NOT a match
Answer C) 3xy(7x+2) = 3(10)(2)(70+2) = 4320 NOT a match
Answer D) 3x(2y+7) = 3(10)(4 + 7) = 330 This IS a match
Answer E) 4x(y+8) = 4(10)(2+8) = 400 NOT a match
Final Answer:
GMAT assassins aren't born, they're made,
Rich
This question can also be solved by TESTing VALUES.
We're told that Nancy gets paid X dollars per day for a 3-day work week, but if it's an 'overtime' day (anything MORE than 3 days per week), then it's DOUBLE that (so 2X dollars per day). We're asked how much she was paid for 4 weeks with no overtime and 3 weeks with Y extra days per week of overtime.
Let's TEST....
X = 10
Y = 2
So Nancy gets paid $10 per day for 3 days during a normal week....that's $30 per week.
By working 2 extra days in a week, she gets paid the $30 for the first 3 days, then 2($20) for the extra 2 days....that's $70 for those weeks.
Over 4 regular weeks and 3 of these specific overtime weeks, she would make....
4($30) + 3($70) =
$120 + $210
$330
So we're looking for an answer that equals 330 when X=10 and Y=2...
Answer A) 3y(7x+2xy) = 3(2)(70+40) = 660 NOT a match
Answer B) 3x+12y = 3(10) + 12(2) = 54 NOT a match
Answer C) 3xy(7x+2) = 3(10)(2)(70+2) = 4320 NOT a match
Answer D) 3x(2y+7) = 3(10)(4 + 7) = 330 This IS a match
Answer E) 4x(y+8) = 4(10)(2+8) = 400 NOT a match
Final Answer:
GMAT assassins aren't born, they're made,
Rich
