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  • Out of a group of 8 students, 5 are to be arranged in a queue, among which particular 3 out of 8 must be definitely there. Then the number of ways in which queue can be formed is <div clas

Out of a group of 8 students, 5 are to be arranged in a queue, among which particular 3 out of 8 must be definitely there. Then the number of ways in which queue can be formed is 

Option: 1

1000


Option: 2

1100 


Option: 3

1200 


Option: 4

1300 


Answers (1)

best_answer

Out of 8 students - 3 students are already fixed 

So out of remaining 5 - any two more have to be included 

No. of ways of selecting those two = ^ 5 C _2 = 10

Now we have a total of 5 students, so these five can be arranged in 5 ! i.e 120 ways 

\thereforeTotal number of ways = 120 * 10 = 1200 

Posted by

SANGALDEEP SINGH

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