(4) गणित और (5) भौतिकी पुस्तकों में से (1) गणित और (2) भौतिकी पुस्तकें कितने तरीकों से चुनी जा सकती हैं?
From (4) mathematics and (5) physics books, in how many ways can (1) mathematics book and (2) physics books be chosen?
Explanation opens after your attempt
C. (40)
Concept
The ways are \(\binom{4}{1}\binom{5}{2}=4\cdot10=40\). The multiplication rule applies to selections from different subjects.
Why this answer is correct
The correct answer is C. (40). The ways are \(\binom{4}{1}\binom{5}{2}=4\cdot10=40\). The multiplication rule applies to selections from different subjects.
Exam Tip
तरीके \(\binom{4}{1}\binom{5}{2}=4\cdot10=40\) हैं। अलग विषयों के चयन में गुणा नियम लगता है।
Login to save your score, XP, coins and progress.
