(10) प्रश्नों में से (6) प्रश्न चुनने हैं और अंतिम (4) प्रश्नों में से कम से कम (2) प्रश्न चुनने हैं। कितने चयन होंगे?
From (10) questions (6) are to be selected and at least (2) of the last (4) questions must be selected. How many selections are there?
Explanation opens after your attempt
Correct Answer
C. (185)
Concept
The cases are choosing (2), (3), or (4) from the last (4). The total is \(\binom{4}{2}\binom{6}{4}+\binom{4}{3}\binom{6}{3}+\binom{4}{4}\binom{6}{2}=185\).
Why this answer is correct
The correct answer is C. (185). The cases are choosing (2), (3), or (4) from the last (4). The total is \(\binom{4}{2}\binom{6}{4}+\binom{4}{3}\binom{6}{3}+\binom{4}{4}\binom{6}{2}=185\).
Exam Tip
मामले अंतिम (4) में से (2), (3) या (4) चुनने के हैं। कुल \(\binom{4}{2}\binom{6}{4}+\binom{4}{3}\binom{6}{3}+\binom{4}{4}\binom{6}{2}=185\) है।
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