एका शहरामध्ये 65% लोक दूरदर्शनवरील बालम्या पाहतात, 40% लोक वर्तमानपत्रे वाचतात, तर 25% लोक वर्तमानपत्र वाचतात आणि दूरदर्शनही पाहतात. तर या शहरातील किती टक्के लोक वर्तमानपत्र वाचत नाहीत आणि दूरदर्शनही पाहत नाहीत ?

The correct answer is Option D (20%).

Key Points:
• The key concept is solving overlapping percentage sets using the Set Theory formula.
• Let A be people who watch TV (65%), B be people who read newspapers (40%), and A ∩ B be people who do both (25%).
• The percentage of people who do at least one of these activities is A ∪ B = A + B - (A ∩ B).
• A ∪ B = 65% + 40% - 25% = 105% - 25% = 80%.
• So, 80% of people are engaged in at least one activity.
• The percentage of people who do neither = Total (100%) - A ∪ B.
• Neither = 100% - 80% = 20%.
• Therefore, 20% of people neither read newspapers nor watch TV.
• Key Takeaway: Use the formula n(A ∪ B) = n(A) + n(B) - n(A ∩ B) to find the 'at least one' group, then subtract from 100%.