Ans 3/5
Suppose there are d no of day workers and they loaded x boxes/worker so total no of boxes loaded by day worker = dx
There are 4d/5 night workers and they loaded 3x/4 boxes/worker.. total no of boxes loaded by night worker = (4d/5)*(3x/4) = 3dx/5
ratio = (3dx/5 )/dx = 3/5
OG 138
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Source: Beat The GMAT — Problem Solving |
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llewellyn27
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Is the Answer 5/8
Assume Days had 20 boxes/ worker and had 10 workers.
Total boxes by Days = 200
Therefore Nights loaded 3/4 * 20 = 15 boxes per worker
And
Nights had 4/5 * 10 = 8 workers
Total boxes by nights = 120
Fraction of boxes loaded by Days as part of whole = Part / whole
= 200/320 = 5/8
Please give some feedback
Assume Days had 20 boxes/ worker and had 10 workers.
Total boxes by Days = 200
Therefore Nights loaded 3/4 * 20 = 15 boxes per worker
And
Nights had 4/5 * 10 = 8 workers
Total boxes by nights = 120
Fraction of boxes loaded by Days as part of whole = Part / whole
= 200/320 = 5/8
Please give some feedback
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ektamatta
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yeah i think answer is 'E'
This is how i solve the problem...by plug in
Assumed day crew loaded = 20 night crew loaded 3/4 of 20=15
then, assumed day crew workers 15 and night crew worker= 4/5 of 15=12
Now according to the question
Night crew= 15@12=180
Day crew = 20@15 =300
When we combine both the crew together we will get 300 +180=480
In question ..we have to find fraction of both the crew by day crew so
300/480=5/8answer
This is how i solve the problem...by plug in
Assumed day crew loaded = 20 night crew loaded 3/4 of 20=15
then, assumed day crew workers 15 and night crew worker= 4/5 of 15=12
Now according to the question
Night crew= 15@12=180
Day crew = 20@15 =300
When we combine both the crew together we will get 300 +180=480
In question ..we have to find fraction of both the crew by day crew so
300/480=5/8answer
this question is confusing and the best way is to plug in numbers. first you have to break the question up by parts. i think the easiest way is to find how many day crew members vs. night crew members. Lets say the day crew has
20 members. Well night crew (4/5)* 20= 16.
night crew =16
day crew =20
each night crew member loaded 3 boxes
each day crew member loaded 4 boxes.
20*4= 80= boxes total for day crew
16*3= 48= boxes total for night crew
boxes total for day crew/ boxes total for 2 crews = 80/128= 5/8
20 members. Well night crew (4/5)* 20= 16.
night crew =16
day crew =20
each night crew member loaded 3 boxes
each day crew member loaded 4 boxes.
20*4= 80= boxes total for day crew
16*3= 48= boxes total for night crew
boxes total for day crew/ boxes total for 2 crews = 80/128= 5/8
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bynddrvn
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I just found this solution to the Official Guide 12ed problem solving question #138, he uses the table method to solve the problem. Very easy to understand; although, if people keep making the math look so easy we will probably start to see some Physics II questions on the exam. Physics II hurt my brain 
https://www.youtube.com/watch?v=qwmMtKO3Rn4
https://www.youtube.com/watch?v=qwmMtKO3Rn4
