allery45 विद्यार्थ्यांच्या एका वर्गात, 25 जण इतिहास शिकतात, 20 जण भूगोल शिकतात आणि 5 जण यांपैकी काहीही शिकत नाहीत. दोन्ही विषय शिकणारे किती विद्यार्थी आहेत?
A15
B10
C5
D0
Answer & Solution
Correct answer: C. 5
Union = 45 - 5 = 40. Both = 25 + 20 - 40 = 5.
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