An estimate always makes sense.
-- I have $10 in my pocket, this pump says $2.21 a gallon, and my car has been getting about 29 mpg. How many miles can I buy ?
-- I'm responsible for the reading two weeks from next Saturday. I'm about 1/3 of the way through learning 190 lines. How many lines must I average learning each day from now til then ?
-- I'm 32 miles from home and rush hour is srarting to build. My wife wants to know when I'll be there. What shall I tell her ?
Answer:
825-232=593
Step-by-step explanation:

minus and minus are cut . Hope it helps..
For the sample:

Applying this to the whole population:

Since we can't have "0.52 of a person" we roudn to the neares whole, or 496.