Posted by **Dan** on Friday, December 17, 2010 at 10:16pm.

to identical jars are filled with equal amount of marbles. the marbles are coloured red or white. the ratio of red to white marblesis 7:1 in jar 1 and 9:1 in jar 2. if there are 90 white marbles altogether, determine the number of red marbles in jar 2.

- Math -
**anon**, Friday, December 17, 2010 at 10:34pm
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.

- Math -
**Dan**, Friday, December 17, 2010 at 10:56pm
how did you get x to equal 400

- Math -
**anon**, Tuesday, December 21, 2010 at 7:00pm
By solving the equation x/8 + x/10 = 90.

Sorry for the late response.

## Answer This Question

## Related Questions

- Math - to identical jars are filled with equal amount of marbles. the marbles ...
- math - to identical jars are filled with equal amount of marbles. the marbles ...
- PLEASE HELP! - A jar contains 24 blue marbles, 16 red marbles, and 14 white ...
- Ratio - A jar contains 2 red marbles,6 blue marbles,4 white marbles, and 12 ...
- algebra - One jar holds 16 red marbles and 4 blue marbles. A second jar holds 75...
- math - in a jar of 40 marbles there are 12 red marbles 19 blue marbles and there...
- Probabilty - There is a large jar of marbles, containing red, blue, yellow, ...
- math - a jar contains 5 blue marbles, 8 red marbles,4 white marbles,and 3 purple...
- Math - A jar contains 6 red marbles and 10 blur marbles all of equal size. if ...
- math - Suppose a jar contains 5 red marbles and 33 blue marbles. If you reach in...

More Related Questions