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14 Jul 2020, 04:19
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
83% (01:46) correct
17%
(02:23)
wrong
based on 155
sessions
History
Date
Time
Result
Not Attempted Yet
X students are attending summer courses at Harvard University. Y have registered for History, Z have registered for Science, and Q have registered for neither History nor Science. How many have signed up for BOTH History and Science?
A. (Y + Z)/X
B. (Y + Z - Q)/X
C. X/(Y + Z + Q)
D. Y + Z + Q - X
E. Y + Z - Q - X
A. (Y + Z)/X
B. (Y + Z - Q)/X
C. X/(Y + Z + Q)
D. Y + Z + Q - X
E. Y + Z - Q - X
Updated on: 22 Feb 2025, 02:03
Originally posted by GMATinsight on 14 Jul 2020, 04:31.
Last edited by Bunuel on 22 Feb 2025, 02:03, edited 2 times in total.
Last edited by Bunuel on 22 Feb 2025, 02:03, edited 2 times in total.
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Bunuel
Answer: Option D
Please check the explanation below
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Screenshot 2020-07-14 at 5.00.54 PM.png [ 484.95 KiB | Viewed 2341 times ]
yashikaaggarwal
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14 Jul 2020, 04:33
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X students are attending summer courses at Harvard University. Y have registered for History, Z have registered for Science, and Q have registered for neither History nor Science.
Let X be 100
Y be 70
Z be 50
Q = 30
And R = no. Of students registered for both.
Both = no. Of students registered for history + no. Of students registered for science+ no. Of students registered for none - total
R = 70+50+30-100
R = 50
R = Y+Z+Q-X
Answer is D
Posted from my mobile device
Let X be 100
Y be 70
Z be 50
Q = 30
And R = no. Of students registered for both.
Both = no. Of students registered for history + no. Of students registered for science+ no. Of students registered for none - total
R = 70+50+30-100
R = 50
R = Y+Z+Q-X
Answer is D
Posted from my mobile device
