In a class 60% of the students pass in Hindi and 45% pass in Sanskrit. If 25% of them pass in both subjects, what percentage of the student fails in both subjects?
Explanation:
H ∪ S = H + S – H ∩ S
⇒ H ∪ S = 60 + 45 – 25 = 80% ∴ 80% students pass in at least one of Hindi or Sanskrit.
⇒ 20% students failed in both the subjects.
Hence, option (b).
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