262total no. of ways = 14!
for favourable outcomes,
first fix A.
then there are 2 places for B
remaining 13 people in 13!
thus favourable outcomes = 2*13!
p/q = 2/7
p+q =9
If the probability that there are exactly 4 persons between A and B while seating 15 persons around a round table is pq (where p and q are in their lowest form), then find p+q?
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3 Answers
262
1057@aditya....u did everything right except that 2 x 13!14! is 17 and not 27 !! :P