Question

A bag contains 120 marbles. Some are red and the rest are black. There are 19 red marbles for every black marble. How many red marbles are in the bag? Explain your reasoning. *

Answer 1

144 red balls

Explanation:

ratio of red is to black is 19:1

let red ball be 19x and black ball be 1x

19x+1x=120

20x=120

x=6

substituting value of x in red ball

Answer 2

There would be 190 red marbles and 10 black marbles.

Explanation:

You have to 19x10=190+10=200