While a family was away on vacation, they paid a neighborhood boy $11

Question

While a family was away on vacation, they paid a neighborhood boy $11 per week to mow their lawn and $4 per day to feed and walk their dog. If the family was away for exactly 3 weeks, how much did they pay the boy for his services?
 
A. $45
B. $54
C. $71
D. $95
E. $117

(PS05001)

chetan2u · Answer

Let's work on each week..
To mow the lawn - 11$
To feed dog - 4$ per day so 4*7$=28$
Total for one week =11+28=39$

So for 3 weeks 39*3=117

E

abhinav770 · Answer

I believe the moment you start calculating the  exact figure  boy would receive, you fall for a trap and lose some time. Instead, for questions like this, I'd suggest eliminate all options which don't fit the criterion.

Since the boy is entitled to $84 ($4*3*7), just for feeding and walking the dog, go ahead and mark the option greater than $100, which is only one choice. That being said, this method should be used with  caution.

KSBGC · Answer

Note:

1. Family paid $11 per week to mow their lawn. 
2. Family paid $4 per day to feed their cows.

Requirement:
To find out the total cost of the family during 3 weeks trips .

Calculation:

3*11 = 33
21*4 = 84

(33+84) = $117

Thus the best option is E.

BrentGMATPrepNow · Answer

..... paid a neighborhood boy $11 per week to mow their lawn...  
So, in  3  weeks, the amount the family paid for lawn-moving = ( 3  weeks)($11/week) = $33

...the family paid $4 per DAY to feed and walk their dog...  
3 weeks =  21 DAYS 
So, the amount the family paid for dog care = ( 21  days)($4/day) = $84

TOTAL amount paid = $33 + $84 = $117

Answer: E

Cheers,
Brent

JeffTargetTestPrep · Answer

The family paid:

11 x 3 + 4 x 21 = 33 + 84 = 117 dollars.

Answer: E

nust2017 · Answer

Just a question for experienced folks on here. Do such easy questions even appear on the gmat? This seems like a 300 level at best.

Thanks.

BijayKru · Answer

11*3 =33
21*4=84
So total =117

Himali24 · Answer

11 per week

then for three weeks - 11*3 = 33
$ per day for feeding dog
total number of days - 21 * 4
84

84 + 33 117

avigutman · Answer

Video solution from Quant Reasoning:
 https://www.youtube.com/watch?v=upv6uwocqXc

Abhishek009 · Answer

11*3 + 4*21 = 33 + 84 => 117 Answer is (E)

GMATinsight · Answer

Answer: Option E

Video solution by  GMATinsight

https://www.youtube.com/watch?v=hIFkhJeYTH0

tarunrathi999 · Answer

= 11*3 + 21*4 
= Last digit need to be 7 
Only E fits the answer

Abhishek009 · Answer

11*3 + 4*7*3 = 33 + 84 = 117 , Answer will be (E)

SameeranKarpe · Answer

Once you find that it requirs $84 to pay for feeding the dog, you can eliminate A,b,c and once you find you pay 33$ for the lawn you can eliminate D without calculating the sum, because the value of D is lower than the sum of 33 and 84

While a family was away on vacation, they paid a neighborhood boy $11

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While a family was away on vacation, they paid a neighborhood boy $11

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