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I think b is the answer
It's not A. Be careful, there's only 39 total of students who knew how to play the guitar. 17 of them played the piano. How many of those students who knew how to play the guitar did not know how to play the piano?
Dom is right. It is B. total of students who played the guitar is 39 number of students who played the piano and the guitar was 17 that means (39-17)= the number of students who played the guitar but did not know how to play the piano. 39-17 is 22
Dom is therefore right. The answer is B.
have you read the question on the attachment dom asked?
That's fine! No need to apologize.
Thank you guys so much!