TS ICET 23 May 2019 Shift 2 Paper

Question : 149 of 200

Marks: +1, -0

If three vertices are selected at random from the vertices of an octagon, then the probability that no two of their three vertices are adjacent to each other is

Validate

Solution:

Out of eight, 3 vertices can be selected in

^8C_3 = 56

ways.
We can select three vertices such that no two are adjacent in 16 ways.
∴ The required probability

=16/56=2/7

Go to Question:

Prev Question

Next Question