Question

how many groups of 2 in 10​

Answer 1

Answer:

5 as 10 divided by 2 is 5

Step-by-step explanation:

Answer 2

Let the numbers be a1, a2, ..., a3, ..., a10

We may choose groups of 2 as (a1,a2); (a2, a1) etc.

Hence, such groups can be made in ways = 10C2 = 10!/2!(8)! = 45

HOPE THIS COULD HELP!!!