(14) वस्तुओं में से (7) चुननी हैं, जिनमें एक निश्चित (5) वस्तुओं के समूह से ठीक (3) वस्तुएँ हों। कुल चयन कितने हैं?
From (14) objects, (7) are chosen with exactly (3) objects from a fixed group of (5). How many selections are possible?
Explanation opens after your attempt
Correct Answer
A. (1260)
Concept
The selection is \( \binom{5}{3}\binom{9}{4}=1260 \). Exactly (3) means the remaining (4) come from outside the fixed group.
Why this answer is correct
The correct answer is A. (1260). The selection is \( \binom{5}{3}\binom{9}{4}=1260 \). Exactly (3) means the remaining (4) come from outside the fixed group.
Exam Tip
चयन \( \binom{5}{3}\binom{9}{4}=1260 \) है। ठीक (3) का अर्थ है बाकी (4) बाहर वाले समूह से आएँगे।
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