Question

how many pairs of co primes can be formed from the set (2,5,6,7,8,9,12).

Answer 1

Answer:

14

Step-by-step explanation:

(2,5) , (2,7) , (2,9) , (5,6) , (5,7) , (5,8) , (5,9)

(5,12) , (6,7) , (7,8) , (7,9) , (7,12) , (8,9) ,

(9,12)

Answer 2

Answer - 13

(2,5) (2,7) (2,9) (5,6) (5, 7) (5,8) (5,9) (5,12)

(6,7) (7,8) (7,9) (7,12) (8,9)