Question

in a class consisting of 100 student,20 know english,20 do not know hindi,10 know niether english nor hindi,then find the number of student knowing both english and hindi.

Answer 1

Answer is 60 students.

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Answer 2

50 students know both english and hindi.

Since , No .of students = 100
students know english = 20
don't know hindi = 20
neither english nor hindi = 10
10+20+20 = 50 don't know all the two languages.
100-50 = 50 students know both languages.

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