(5) गणित, (4) भौतिकी और (3) रसायन पुस्तकों में से (6) पुस्तकें चुननी हैं। चयन में ठीक (2) विषयों की पुस्तकें हों। कुल कितने चयन संभव हैं?
From (5) mathematics, (4) physics, and (3) chemistry books, (6) books are to be selected. The selection must contain books from exactly (2) subjects. How many selections are possible?
Explanation opens after your attempt
Correct Answer
C. (119)
Concept
Choose (6) books from each pair of subjects and add the three results. Here, selecting all (6) from one subject is impossible.
Why this answer is correct
The correct answer is C. (119). Choose (6) books from each pair of subjects and add the three results. Here, selecting all (6) from one subject is impossible.
Exam Tip
हर दो विषयों की जोड़ी से (6) पुस्तकें चुनें और तीनों जोड़ें। यहाँ किसी एक विषय से (6) पुस्तकें लेना संभव नहीं है।
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