A regular polygon of 10 sides is constructed. No. of ways 3 vertices be selected so that no two vertices are consecutive is

see full answer

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

No of ways of selecting 3 from 10 vertices=10c3=120 Two consecutive=10×6c1=60 Three consecutive=10 =120−60−10=50 or =n(n−4)(n−5)6=50

Watch 3-min video & get full concept clarity