alleryएक विद्यालय में, 80 छात्र कला लेते हैं, 60 संगीत लेते हैं और 30 दोनों विषय लेते हैं। इनमें से कम से कम एक विषय लेने वाले छात्रों की संख्या कितनी है?
A90
B100
C105
D110
Answer & Solution
Correct answer: D. 110
कम से कम एक = n(कला ∪ संगीत) = 80 + 60 - 30 = 110.
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