COMEDK · Maths · 36. Probability
Three vertices are chosen randomly from the 10 vertices of a regular 10 sided polygon. The probability that they form the vertices of an isosceles triangle is
- A \(\frac{4}{7}\)
- B \(\frac{3}{7}\)
- C \(\frac{4}{8}\)
- D \(\frac{3}{8}\)
Answer & Solution
Correct Answer
(D) \(\frac{3}{8}\)
Step-by-step Solution
Detailed explanation
Number of triangle formed \(={ }^{10} C_3\) Number of isosceles triangle \(=10\left(\frac{10-1}{2}\right)\) \(=5 \times 9=45\) So, required…
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