Reshawn is buying 3 books in a trilogy set for $24.81. he will save $6.69 by buying the trilogy set instead of buying individual books. if each book costs the same amount, how much does each of the 3 books cost when purchased individually?

Reshawn is buying 3 books in a trilogy set for $24.81.
He will save $6.69 by buying the trilogy set instead of buying individual books.
Each book costs the same amount
Let’s find out  how much does each of the 3 books cost when purchased individually.
=> 3 books costs = 24.81 dollar in which he saved 6.69 dollar compare to buying individual.
=> 24.81 + 6.69 = 31.5 dollars
=> 31.5 dollars / 3 = 10.5 dollars = the individual price of the books.

I'm sure the answer is a