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Q.

If 100 boys are arranged at random along a circle then the odds against to arrange two specified  boys of those 100 come together is

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a

2 : 97

b

97 : 2

c

2 : 98

d

98 : 2

answer is B.

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Detailed Solution

P(E)=(98!)×299!=299 P(E¯)=9799 P(E¯):P(E)=97:2
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If 100 boys are arranged at random along a circle then the odds against to arrange two specified  boys of those 100 come together is