Answer: A.
, the number of socks in each group is 4
Explanation:
Given: Henry divided his socks into five equal groups.
Let s represent the total number of socks.
If the total number of socks = 20
Then two find the number of socks in each group , we divide the total number of socks by 5 , we get
The number of socks in each group =

Hence, expression and solution represent the number of socks in each group if S=20 is given by :-
, the number of socks in each group is 4