SOLUTION: The first bag has a ratio of 2 blue marbles to 7 red ones. The second bag has the.same. if.the.second.bag.has.36.red.marbles.how.many.blue.ones.does.it.have?

Click here to see ALL problems on Probability-and-statistics

Question 547132: The first bag has a ratio of 2 blue marbles to 7 red ones. The second bag has the.same.
if.the.second.bag.has.36.red.marbles.how.many.blue.ones.does.it.have?
Found 2 solutions by stanbon, JBarnum:
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
The first bag has a ratio of 2 blue marbles to 7 red ones.
The second bag has the.same.
If.the.second.bag.has.36.red.marbles.how.many.blue.ones.does.it.have?
----
2:7 is the same as 2x:7x where 2x is the number of blue marbles.
---
Equation:
2x + 7x = 36
9x = 36
x = 4
---
# of blue = 2x = 8
# of red = 7x = 28
=========================
Cheers,
Stan H.

Answer by JBarnum(2146) (Show Source):
You can put this solution on YOUR website!
im not good at probabilities but this one is basic ratios. if the first and the second bag have the same ratio
and theres 36 red marbles that would make x=36/7=5.1428
so then 2x= 10.2856
his equation cant be right if 36 is number of marbles not TOTAL marbles
this means that and blue marbles