180 students go to a school book exhibition. 110 buy English books, 90 buy Hindi books and at least 30 buy both. What is the least number of students who could have bought neither English nor Hindi books ?

• Out Of 180 Students, 110 buy English, 90 buy Hindi and 30 buy both.
  Therefore, students who bought only English=110-30 = 80 &
  Students who bought only Hindi = 90-30 = 60
  Therefore no.of students who bought neither English nor Hindi = 180-80-60-30=10
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