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19 Oct 2017, 02:39
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
52% (02:38) correct
48%
(02:46)
wrong
based on 219
sessions
History
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In a certain high school graduating class, 60 percent of the students plan to attend college, and 40 percent of the students have grade point averages (GPAs) of 3.0 or above. If 30 percent of the students who plan to attend college have GPAs of 3.5 or above, how many of the students who plan to attend college have GPAs of 3.5 or above?
(1) 90 of the students who plan to attend college have GPAs of 3.0 or above.
(2) 90 of the students in the graduating class have GPAs of 3.5 or above.
(1) 90 of the students who plan to attend college have GPAs of 3.0 or above.
(2) 90 of the students in the graduating class have GPAs of 3.5 or above.
05 Nov 2017, 10:34
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This one is a really tricky question. Took me some time to understand what is asked.
Basically question is giving all the percentages, and asking you to tell the exact number.
This table represents the given data (30% of 60% is 18%)
Question is asking how many students does 18% represent.
1. We are give x+18% is 90.
We can't find how much is 18% from this.
Insufficient
2. Here we are given 18+y% is 90.
We still can't find.
Insufficient.
Both.
Even after using both. We would not be able to find the values of x,y,z.
The statements just help us understand how many students do these percentages represent. Without there values, we can't tell how many is 18%.
E.
Basically question is giving all the percentages, and asking you to tell the exact number.
This table represents the given data (30% of 60% is 18%)
Question is asking how many students does 18% represent.
1. We are give x+18% is 90.
We can't find how much is 18% from this.
Insufficient
2. Here we are given 18+y% is 90.
We still can't find.
Insufficient.
Both.
Even after using both. We would not be able to find the values of x,y,z.
The statements just help us understand how many students do these percentages represent. Without there values, we can't tell how many is 18%.
E.
12 Dec 2017, 23:10
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I thought each of them was enuf to solve.
So the total students = a
Information given:
Those who plan to go to college = 0.6a
Those who have GPA 3.0 above = 0.4a -> those who have GPA 3.5 above = 0.6a
30% of 0.6a = 0.18a Those who plan to attend college and have GPA 3.5 above -> 0.6a - 0.18a = 0.42a - Those who plan to attend to college and have GPA 3.0 above
Question: 0.18a = ?
(1) 90 of the students who plan to attend college have GPAs of 3.0 or above.
0.42a = 90
=> We will know the value of a -> 0.18a
=> Suf
(2) 90 of the students in the graduating class have GPAs of 3.5 or above.
0.6a = 90
=> Like (1)
=> Suf
Can anyone please correct me?
So the total students = a
Information given:
Those who plan to go to college = 0.6a
Those who have GPA 3.0 above = 0.4a -> those who have GPA 3.5 above = 0.6a
30% of 0.6a = 0.18a Those who plan to attend college and have GPA 3.5 above -> 0.6a - 0.18a = 0.42a - Those who plan to attend to college and have GPA 3.0 above
Question: 0.18a = ?
(1) 90 of the students who plan to attend college have GPAs of 3.0 or above.
0.42a = 90
=> We will know the value of a -> 0.18a
=> Suf
(2) 90 of the students in the graduating class have GPAs of 3.5 or above.
0.6a = 90
=> Like (1)
=> Suf
Can anyone please correct me?
