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Data Sufficiency Butler: November 2024
November 4	DS 1	DS 2

a jar contains marbles of 4 different colors. the number of blue marbles is three times as many as the yellow ones. the number of red marbles is half of that of yellow ones. the number of orange marbles is equal to the number of red ones. what percentage of the marbles is yellow in color?

a jar contains marbles of 4 different colors. the number of blue marbles is three times as many as the yellow ones. the number of red marbles is half of that of yellow ones. the number of orange marbles is equal to the number of red ones. what percentage of the marbles is yellow in color?

a jar contains marbles of 4 different colors. the number of blue marbles is three times as many as the yellow ones. the number of red marbles is half of that of yellow ones. the number of orange marbles is equal to the number of red ones. what percentage of the marbles is yellow in color?

a jar contains marbles of 4 different colors. the number of blue marbles is three times as many as the yellow ones. the number of red marbles is half of that of yellow ones. the number of orange marbles is equal to the number of red ones. what percentage of the marbles is yellow in color? a] 10 b]15 c]20 d] 21.1

how did you calculate it

b=3y, r=y/2=>r=2y, o=r=2y let y be 1 and solve

let yellow marbles are 2,
then blue will be 6,
Red will be 1, orange will be 1,
Total 10.
2out of 10 I.e. 20%

yellow - x
blue - 3x
red - x/2
orange - x/2

total - x/2 + x/2 + 3x + x = 5x

yellow = (x /5x ) X 100 = 20 %

at-most-100-students-at-a-certain-school-study-mathematics-if-at-most-434406.html
can anyone help with this question? why is it archived, posted by @bunuel ? due to poor quality or already posted elsewhere
this is a DS butler qs

Hi all, does anyone know if I can send any of my gmat focus scores? Or I must send the last one?

can send any, each score has individual send option

Problem Solving Butler: November 2024
November 5	PS 1	PS 2

Data Sufficiency Butler: November 2024
November 5	DS 1	DS 2

Critical Reasoning Butler: November 2024
November 5	CR 1	CR 2

Of the scientists that attended a workshop, 31 were Wolf Prize winners and 13 of those 31 had also won the Nobel Prize. Of those that had not won the Wolf Prize, 3 more had won the Nobel Prize than had not won the Nobel Prize. If a total of 50 scientists attended the workshop, how many of them were Nobel Prize winners?

Please help, right answer is 24

13/31 of Nobel prize winner are already given, from the rest 19 who didn’t win wolf, winners were 3 more than non-winners. Only one option possible, where given condition will be satisfied that is: 11 won 8 didn’t win.
So in total 13+11 =24

I just started preparing this is what I came up with. Don’t know if it’s the right way

31, were Wolf prize winners, so 19 didnt win the Wolf prize.

Of those 19, let x be non-winners
And x+3 be winners
So, x+x+3 = 19
2x = 16
X=8
X+3 = 11 - Non Wolf Prize winner but Noble Prize winner

13 - Wolf and Noble Prize Winner

So, 11+13= 24 Noble Prize Winners

Hi, it has been discussed here - 31-of-the-scientists-that-attended-a-certain-workshop-were-wolf-prize-311324.html