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TOPIC: This question confused me.
#2789
web_logics (User)
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This question confused me. 1 Year ago Karma: 0  
Help needed solving this problem

If in a certain school 20 students are taking math and 10 are taking history and 7 are taking both, how many students are taking either math or history?

I realize that it is 20+10-7=23. However I feel it would be 20+10+7= 37

Please help.
 
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#3721
madhwani_vicky (User)
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Re:This question confused me. 10 Months ago Karma: 0  
I think the answer should be 16

Assuming all students take atleast one class

Total students taking math = 20

Total students taking history = 10

Students taking both the classes = 7

Students taking only math = Total students taking math - Students taking both the classes = 20 - 7 = 13

Students taking only history = Total students taking history - Students taking both the classes = 10 - 7 = 3

Hence students taking either math or history = 13 + 3 = 16
 
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#3736
alankar (Moderator)
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Re:This question confused me. 10 Months ago Karma: 3  
The answer is 16.

7 take both,so we do not need to consider that.
 
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#4832
somaninikhil (User)
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Re:This question confused me. 9 Months, 1 Week ago Karma: 0  
it must be 16
 
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#4852
akshayvs (User)
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Re:This question confused me. 9 Months, 1 Week ago Karma: 0  
16..

good q
 
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