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consider i as 3 and subsititute the values in the equation...the left side of the equation will basically be equal to a5 and the right side of the equation will become 2 * a5 + 3 * a3....again subsitute the values for a5 as 51 and a3 as 9 and find the value of a4
There will be 5 chosen seats and 16-5=11 seats not chosen. If we arrange these 11 seats in a row, we will have 12 gaps between them.... Gap Seat Gap Seat Gap Seat and so on.....In these 12 gaps, we need to arrange our 5 chosen seats >>> 12C5 = 792. Since everything is identical, we will not permute anything, i.e, not do a 5! while arranging these 5 seats....which is why, I think the answer should be D. 792
Go as relaxed as u can. I scored a 675 in the recent attempt by relaxing and solving questions. In my previous attempts I was tensed, that brought down my score.
Also remember there is penalty for leaving unanswered ques and first few ques most important can make or break ur score.