Combination and Permutation

क्रमचय और संचय
Combination and Permutation

Question 10 of 36

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Question 10

एक बहुभुज (Polygon) में 20 भुजाएं हैं। इसके कितने विकर्ण (Diagonals) होंगे?

A. (a) 190

B. (b) 180

C. (c) 170

D. (d) 200

Explanation विकर्ण = nC2 - n = 20C2 - 20 = 190 - 20 = 170।

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