JEE Main 2019 Mathematics question on Permutations and Combinations
Suppose that 20 pillars of the same height have been erected along the boundary of a circular stadium. If the top of each pillar has been connected by beams with the top of all its non-adjacent pillars, then the total number of beams is
A.
180
B.
210
C.
170
D.
190
Show answer
Correct option: C
[JEE Main 2019 · 10 Apr · Shift II]
Practise Permutations and Combinations the way it is asked
A timed set of real JEE Main Permutations and Combinations questions, graded as the exam grades. No sign-up.
