SOLUTION: A jar contains marbles in the ratio of 11 red to 5 black. If there 230 black marbles, how many red marbles are there? Select the correct answer. a. 506 red b. 501 red c.

Algebra ->  Proportions  -> Lessons -> SOLUTION: A jar contains marbles in the ratio of 11 red to 5 black. If there 230 black marbles, how many red marbles are there? Select the correct answer. a. 506 red b. 501 red c.       Log On


   

Question 810293: A jar contains marbles in the ratio of 11 red to 5 black. If there 230 black marbles, how many red marbles are there?
Select the correct answer.
a. 506 red
b. 501 red
c. 519 red
d. 485 red
Found 2 solutions by erica65404, stanbon:
Answer by erica65404(394) About Me  (Show Source):
You can put this solution on YOUR website!
simply make the ratio a fraction 11/5 and make the x reds 230 blacks a fraction and make them equal to each other. make sure the units matvh up. red on top and black on bottom.
11%2F5=x%2F230
cross multiply
2530=5x
x=506
the answer is a.506 red.

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A jar contains marbles in the ratio of 11 red to 5 black.
If there 230 black marbles, how many red marbles are there?
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11:5 is the same as 11x:5x where 5x is the number of black marbles.
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Solve:: 5x = 230
x = 46
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Then # of red = 11x = 11*46 = 506
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Cheers,
Stan H.
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Select the correct answer.
a. 506 red
b. 501 red
c. 519 red
d. 485 red