Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_39542 ( "Rank" real, "Place" text, "County" text, "Per Capita Income" text, "Median House- hold Income" text, "Median Family Income" text, "Population" real, "Number of Households" real )

### Question ###
What is the population where the rank is higher than 51 and the Median House-hold income is $25,250?

### Accurate SQL ###

SELECT SUM("Population") FROM table_39542 WHERE "Rank" > '51' AND "Median House- hold Income" = '$25,250'