A) \[19\]
B) \[20\]
C) \[15\]
D) \[25\]
E) None of these
Correct Answer: E
Solution :
Let M represents Mathematics and Ph represents Physics. We know that, \[n(M\cup Ph)=n(M)+n(Ph)-n(M\cap Ph)\] \[\Rightarrow \] \[64=55+n(Ph)-10\] \[\Rightarrow \] \[64=45+n(Ph)\] \[\Rightarrow \] \[n(Ph)=64-45\] \[\Rightarrow \] \[n(Ph)=19\] Only physics \[=n(Ph)-n(M\cap Ph)\] \[=19-10=9\]sYou need to login to perform this action.
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