Permutations And Combinations Question 56

Question: The number of diagonals in a octagon will be [MP PET 1984; Pb. CET 1989, 2000]

Options:

A) 28

B) 20

C) 10

D) 16

Show Answer

Answer:

Correct Answer: B

Solution:

  • Required number of ways are $ ^{8}C_2-8=20 $ .