JEE MainMathematicsPermutations and CombinationsMCQ+4 / −1
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 :
- A180
- B210
- C170
- D190
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