Answer:
7 students have neither blue nor brown hair.
Step-by-step explanation:
Consider the inequality 
First, add (-3) to both sides of inequality:

Then multiply by (-1), remembering that multiplication by negative number changes the sign of inequality:

Now divide by 3:

Answer: correct choice is A.
The answer would be -36 because all i did is multiply -12 with 3 and you get -36.
hope this helped :)
The answer is 2/15
6/15 * 5/15 = 30/225 = 6/45 = 2/15