Three of the six vertices of a regular hexagon are chosen at random. The probability that the triangle with these three vertices is equilateral, is equal to
Three of the six vertices of a regular hexagon are chosen at random. The probability that the triangle with these three vertices is equilateral, is equal to
- [IIT 1995]
- A
$\frac{1}{2}$
- B
$\frac{1}{5}$
- C
$\frac{1}{{10}}$
- D
$\frac{1}{{20}}$
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