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30 Dec 2014, 09:05
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Can any one give detail solution of second question? Please explain how I will think and do these questions quickly. Get Kudos
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hopeful101candidate
Joined: 12 Aug 2014
Last visit: 15 May 2018
Posts: 145
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Location: United States (AZ)
Concentration: Finance, Strategy
Schools: Cnsrtm-Johnson '20 (A) Cnsrtm-Darden '20 (A) Cnsrtm-Goizueta '20 (A) Cnsrtm-McCombs '20 (A)
GMAT 1: 700 Q47 V39
Schools: Cnsrtm-Johnson '20 (A) Cnsrtm-Darden '20 (A) Cnsrtm-Goizueta '20 (A) Cnsrtm-McCombs '20 (A)
GMAT 1: 700 Q47 V39
Posts: 145
30 Dec 2014, 11:34
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Hi Rajibuddin,
If I were low on time and just had to eyeball, I would guess C (Section C) based on where the dots are concentrated. You can see that most of the students in Section C tend to study for fewer hours than students in other sections. However, you could also do the math fairly quickly to determine which Section had the lowest average (remember, the average will be the total number of hours studied/11 students in each section). Therefore, you can simply add the total number of hours studied by each student in each section and determine which section had the lowest number. You don't need to do the division since they will all be divided by the same denominator of 11.
Section A: 1*2 + 2*2 + 3*3 + 4*1 + 5*2 + 8*1 = 37 hours
Section B: 1*1 + 2*3 + 3*1 + 4*4 + 5*1 + 6*1 = 37 hours
Section C: 1*2 + 2*4 + 3*4 + 4*1 = 26 hours
Therefore, the answer would be Section C had the smallest average reported time spent studying during the week.
Hope this helps!
If I were low on time and just had to eyeball, I would guess C (Section C) based on where the dots are concentrated. You can see that most of the students in Section C tend to study for fewer hours than students in other sections. However, you could also do the math fairly quickly to determine which Section had the lowest average (remember, the average will be the total number of hours studied/11 students in each section). Therefore, you can simply add the total number of hours studied by each student in each section and determine which section had the lowest number. You don't need to do the division since they will all be divided by the same denominator of 11.
Section A: 1*2 + 2*2 + 3*3 + 4*1 + 5*2 + 8*1 = 37 hours
Section B: 1*1 + 2*3 + 3*1 + 4*4 + 5*1 + 6*1 = 37 hours
Section C: 1*2 + 2*4 + 3*4 + 4*1 = 26 hours
Therefore, the answer would be Section C had the smallest average reported time spent studying during the week.
Hope this helps!
30 Dec 2014, 11:46
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How stupid I am! I totally concentrated on the wrong exis. I concentrated on Y-xis. Thank you for the reply. It is easy now. Actually we don't need to calculate anything here. By the if the questions asked about the average from y-xis, how would you solve it?
Kudos to you
Kudos to you
