Question

A bag contains 2 steel balls and 5 brass balls. The total weight is 13 pounds. If 2 steel balls are added and 2 brass balls are removed, the weight decreases to 12 pounds. How much does each kind of ball weigh?

A) steel, 4 pounds; brass, 1 pound
B) steel, 1.5 pounds; brass, 2 pounds
C) steel, 0.75 pounds; brass, 3 pounds
D) steel, 3 pounds; brass, 4 pounds

Answer 1

Well right now we know it is not D or C because when you use the weight given in each and multiply it by the amout of steel/brass balls C=16.5 and D=26. They are both over 13.

Answer 2

Then you would subtract and add the new steel and brass balls.

Answer 3

A= 19 which is not equal to 12
B= 12 which is what the answer to your question.

Answer 4

Thank you!

Answer 5

You're welcome! :)