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If three of the six vertices of a regular hexagon are chosen at random, then the probability that the triangle formed with these chosen vertices is equilateral is :

(1)  1/10

(2)  3/10

(3)  3/20

(4)  1/5

1 Answer

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Correct option   (1) 1/10


Number of total triangle = C3 

Equilateral Δ = 2

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