(7) विद्यार्थियों में से (3) विद्यार्थियों को चुनना है और दो विशेष विद्यार्थी दोनों साथ में चुने जाने चाहिए। कितने तरीके हैं?
From (7) students, (3) students are to be selected and two special students must be selected together. How many ways are there?
Explanation opens after your attempt
Correct Answer
B. (5)
Concept
The two special students are already selected. The third student is chosen from the remaining (5) in \(\binom{5}{1}=5\) ways.
Why this answer is correct
The correct answer is B. (5). The two special students are already selected. The third student is chosen from the remaining (5) in \(\binom{5}{1}=5\) ways.
Exam Tip
दो विशेष विद्यार्थी पहले से चुने गए हैं। तीसरा विद्यार्थी शेष (5) में से \(\binom{5}{1}=5\) तरीकों से चुनेगा।
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