A house in Portugal is sold for $13800, given a profit of 15%,Find the original price paid for house.

$12000

Step-by-step explanation:

If the house sold with a profit of 15%, then this means it sold for 115% of its original price (100 + 15 = 115).

Convert 115% into a decimal:  115% = 115/100 = 1.15

Divide 13800 by 1.15 to find the original price: 13800 ÷ 1.15 = 12000

there is only one way to arrange all the eight relative to each other because they are not distinct. we have

now there are nine places to place an (and not more than one in one place).   because we have four symbols, we need to choose four of these nine places to insert an . order does not matter because the are not distinct.

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thus there are 126 ways to form such "words."