GATE Computer Science (CS) 2016 Shift 2 Solved Paper

Consider the following database table named water_schemes:
 
The number of tuples returned by the following SQL query is ______.
with total (name, capacity) as
            select district_name, sum(capacity)
            from water_schemes
            group by district_name
with total_avg (capacity) as
            select avg (capacity)
from total
select name
            from total, total_avg
            where total.capacity ≥ total_avg.capacity