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In a graduating class of 232 students, 144 took geometry and 119 took biology. What is the difference between the greate

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by Vincen » Fri Jun 19, 2020 2:49 am

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In a graduating class of 232 students, 144 took geometry and 119 took biology. What is the difference between the greatest possible number and the smallest possible number of students that could have taken both geometry and biology?

A. 144
B. 119
C. 113
D. 88
E. 31

[spoiler]OA=D[/spoiler]

Source: GMAT Club Tests
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Re: In a graduating class of 232 students, 144 took geometry and 119 took biology. What is the difference between the gr

by deloitte247 » Thu Jun 25, 2020 11:51 pm
Total student => 232
Students that took geometry => 144
Students that took biology => 119


Greatest possible number of students taking both geometry and biology = possibility that all the students that took biology also took geometry


Greatest possible number of students taking both => 119
For the smallest possible number of students doing both:
Total - Neither = A + B - Both
Both = A + B + Neither - Total; where Neither must be equal to 0 in order to get the minimum or smallest value for both
Both = 144 + 119 + 0 - 232 = 31 students


Difference between the greatest and the smallest =>
119 - 31 = 88


Answer = D
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Re: In a graduating class of 232 students, 144 took geometry and 119 took biology. What is the difference between the gr

by swerve » Fri Jun 26, 2020 4:43 am
Vincen wrote: ↑
Fri Jun 19, 2020 2:49 am
 In a graduating class of 232 students, 144 took geometry and 119 took biology. What is the difference between the greatest possible number and the smallest possible number of students that could have taken both geometry and biology?

A. 144
B. 119
C. 113
D. 88
E. 31

[spoiler]OA=D[/spoiler]

Source: GMAT Club Tests
Smallest Possible Number taken both should be given by

Total - Neither = A + B - Both

The greatest is between 144 and 119 is: 119.
The Smallest can be calculated by the formula
Both = A+B+Neither - Total (Neither must be 0 to minimize the both)
So, \(144 + 119 + 0 - 232 = 31\)

Greatest - Smallest is \(119-31 = 88\)
So the correct answer is D
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Re: In a graduating class of 232 students, 144 took geometry and 119 took biology. What is the difference between the gr

by Scott@TargetTestPrep » Sun Jul 05, 2020 1:16 pm
Vincen wrote: ↑
Fri Jun 19, 2020 2:49 am
 In a graduating class of 232 students, 144 took geometry and 119 took biology. What is the difference between the greatest possible number and the smallest possible number of students that could have taken both geometry and biology?

A. 144
B. 119
C. 113
D. 88
E. 31

[spoiler]OA=D[/spoiler]

Solution:

The greatest possible number of students that could have taken both courses is 119, which occurs if all the students who took biology also took geometry. The smallest possible number of students that could have taken both courses is 144 + 119 - 232 = 31, which occurs if we maximize the number of students taking only one course. Therefore, the difference is 119 - 31 = 88.

Answer: D

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