"in an examination 150students secured first class in English or mathematics.115 students secured first class in mathematics.how many students secured first class in English only?"while solving this some my teacher took 50 as n(EnM). how did this 50 came?
THE QUESTION HAD A MISTAKE 50 STUDENTS SECURED FIRST CLASS IN BOTH ENGLISH AND MATHS
THEREFORE,n(EnM)=50
THEREFORE,n(EnM)=50