What is the result of 30-15 multiplied by 1?

To solve the expression 30 - 15 multiplied by 1, you first handle the operation within the parentheses. The calculation starts with the subtraction:

30 - 15 equals 15.

Next, you consider the multiplication with 1. When any number is multiplied by 1, the result remains the same.

Therefore, 15 multiplied by 1 is still 15.

This confirms that the result of the entire expression is 15, which aligns with the choice provided as the correct answer. Multiplication by 1 effectively does not change the value, making this a straightforward calculation.