Posted by Dan on Friday, December 17, 2010 at 10:16pm.
In jar 1, 1/8 of the marbles are white.
In jar 2, 1/10 of the marbles are white.
Since the jars are filled with an equal amount of marbles, take this value to be x. Therefore, x/8 + x/10 should equal to 90, the total number of white marbles.
From this, we get x = 400 marbles altogether.
This means 200 marbles in each jar.
In jar 2, 9/10 of the marbles are red. There are 200 marbles in this jar. (9/10)*200 = 180 red marbles in jar 2.
how did you get x to equal 400
By solving the equation x/8 + x/10 = 90.
Sorry for the late response.
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