(3) गणित और (4) विज्ञान पुस्तकों में से (1) गणित और (1) विज्ञान पुस्तक कितने तरीकों से चुनी जा सकती है?
From (3) mathematics books and (4) science books, in how many ways can (1) mathematics book and (1) science book be chosen?
Explanation opens after your attempt
B. (12)
Concept
The selection is \(\binom{3}{1}\binom{4}{1}=12\). Choices from different types are multiplied.
Why this answer is correct
The correct answer is B. (12). The selection is \(\binom{3}{1}\binom{4}{1}=12\). Choices from different types are multiplied.
Exam Tip
चयन \(\binom{3}{1}\binom{4}{1}=12\) है। अलग प्रकारों में चयन की संख्याएं गुणा होती हैं।
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