If a triangle is formed using the vertices of a cube then the probability that the triangle is equilateral is

Three distinct vertices are randomly chosen among the vertices of a cube. The probability that they from equilateral triangle is

Three vertices are chosen from the vertices of a regular hexagon,then the probability that they will form an equilateral triangle is

If triangles are formed by joining the vertices of a cube then number of equilateral triangles formed is

Three vertices are chosen at random from the vertices of a regular hexagon then The probability that the triangle with these vertices is an equilateral triangle is equal to

Let a triangle is formed whose vertices are the vertices of a cube.The total number of

Three of six vertices of a regular hexagon are chosen at random.The probability that the triangle with three vertices is equilateral is (a) (1)/(2) (b) (1)/(5) (c) (1)/(10) (d) (1)/(20)