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JEE Advanced Mathematics question

MathematicsSets and RelationJEE Advanced

20 teachers of a school either teach mathematics or physics. 12 of them teach mathematics while 4 teach both the subjects. Then the number of teachers teaching only physics is

Answer: (B)

Solution

, , . From : $20 = 12 + n(P) - 4 ⇒ n(P) =

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Question ID VK-109896