Statement:
An average person in Sri Lanka drinks more alcohol than in The Gambia

In the Alcohol average daily consumption rating Sri Lanka holds position #87 2016 out of 189 and The Gambia is #97 out of 189 2016.
Position of Sri Lanka is worse than position of The Gambia.
Both countries holds average positions in the "Alcohol average daily consumption" rating. So Both sexes is an average for both Sri Lanka and The Gambia, compared to most countries of the World.

Referencies:

  1. Alcohol average daily consumption 2016 by WHO
    The countries in the rating sorted by 'Both sexes' in descending order.
    The Gambia 'Both sexes' value is 30.4
    Sri Lanka 'Both sexes' value is 32.2