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Terms in this set (39)
Ratio 4:3:1
What is the percentage as a fraction
4/8 : 3/8 : 1/8
True or false
True.
at least 2 means ≥2
True or false.
True.
at least 2 means >2
True or false.
False.
at most 5 means ≤5
True or false.
True.
at most 5 means <5
True or false.
False.
greater than 3 means >3
True or false.
True.
less than 3 means <3
True or false.
True.
In a day care, 80% of the kids are American. 60% of the kids have started speaking.
True or false. In this case you must construct two tree structures.
True.
If 80% of the employees of a company play soccer, what percent of the employees play golf?
The 80% cannot include golf players.
True or false.
False.
If 80% of the employees of a company play soccer, what percent of the employees play golf?
The 80% can include employees that play both sports. The question does not say exclusively.
True or false.
True.
If 80% of the employees of a company play soccer, what percent of the employees play golf?
This 80% includes employees that play only soccer.
True or false.
True.
If 80% of the employees of a company play soccer, what percent of the employees play golf?
This 80% includes golf and soccer&golf players.
True or false.
True.
In an interview for a certain job, 120 candidates appeared and two questions were asked to each candidate...
The 1st level of the tree will have 3 categories. 0 correct, 1 correct, and 2 correct.
True or false.
True.
In an interview for a certain job, 120 candidates appeared and two questions were asked to each candidate...
The 1st level of the tree will have 4 categories. 0 correct, 1 correct, 2 correct, and 1 correct w/ 1 wrong.
True or false.
False.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
This problem implies that all employees will play a sport.
True or false.
False.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
Some employees will not play either sport.
True or false.
True.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
This problem implies that some employees can play both sports.
True or false.
True.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
This problem implies that an employee will only play one sport.
True or false.
False.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
The category that has "who play golf and also play soccer" is the same as "who play soccer and also play golf."
True or false.
True.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
The category that has "who play golf and also play soccer" is not the same as "who play soccer and also play golf."
True or false.
False.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
Since there are no other details, we can assume there are four categories: only golf, only soccer, both, and neither sport
True or false.
True.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
Since there are no other details, we can assume there are there categories: only golf, only soccer, and both sports
True or false.
False.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
80 represents soccer only and golf & soccer.
True or false.
True.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
80 represents soccer only.
True or false.
False.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
20 represents golf only
True or false.
False.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
20 represents golf & soccer
True or false.
False.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
20 represents golf only and neither
True or false.
True.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
neither = golf only - 20
True or false.
False.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
neither = 20 - golf only
True or false.
True.
Sometimes you are not given the quantity or the percentage of the 1st level of the tree for ex.
1200 animals and they are either cat or dog
setup equation: 1200-C=D or 1200-D=C
True or false.
True.
If a problem is asking for a quantity write Q or if it is asking for a percentage write %.
True or false.
True.
If you see all percentages try to plug in a number. Not all percentages in the prompts/problems can be done this way. for ex. a percentage of a percentage. Only the top is converted then multiply to get the second number.
Yes or No.
Yes.
If 80% of the employees of a company play soccer, what percent of the employees play golf?
This 80% only includes employees that play only soccer.
True or false.
False.
When doing tree diagram NEVER EVER leave a row without a value or some sort.
True or false.
True.
All GMAT tree problems will deal with only one tree.
True or false.
False.
Do not assume there is only one tree in a problem. GMAT tree problems may contain 2 or more trees. Read carefully.
True or false.
True.
950 students
half of the males are tall and a third of the women are short.
x= males 950-x=women.
When doing calculations "950-x" is a harder number to work with, therefore, use Y for "950-x" and if you need solve for x plug "950-x" back in at the end.
True or false.
True.
"If 80% of the employees of a company play soccer, what percent of the employees play golf?"
Write the expression for neither:
Since 80% is totally account for neither could only be 20 - (what we dont know b/c the prompt didnt tell us)
20 - (soccer and soccer & golf)
True or false.
True.
If a problem doesn't say, for example, the guys only have golf and bball as an option then you know there is a neither section too.
True or false.
True.
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