What is the gaining ratio between the remaining partners, Preeti and Shershah, upon Kabir's retirement?

Since the original profit-sharing ratio is assumed to be equal ($1:1:1$) and no specific new ratio or gaining terms are mentioned, the remaining partners (Preeti and Shershah) continue to share the retiring partner's share in their old relative proportions.Thus, their gaining ratio remains equal, which is $1:1$.