Question

In a village of 300 persons 180 take tea. find how many take coffee but not tea

Answer 1

if 180 take tea then rest of the person might take coffee.
therefore 120 person of village take coffee
by, 300-180=120

Answer 2

Total Population of village = 300
People taking tea = 180
People not taking tea = 300-180 = 120
So remaining 120 people may or may not take cofee but they certainly do not take tea