25% is 1/4.
so 1/4 of 60 tables have two seats.
then 3/4 of 60 tables have 4 seats.
1/4 X 60 = 15
There are 15 tables with two seats. which is equal to 30 seats.
3/4 X 60 = 45
There are 45 tables with 4 seats. which is equal to 180
so altogether there are
180 + 30 = 210 seats.