math
posted by Gorege .
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 marbles altogether, determin the number of red marbles in jar 2.

let the number of white marbles in the first jar be x
then the number of red marbles in the first jar is 7x
total in jar 1 is 8x
let the number of white marbles in jar 2 be y
then the number of red marbles in jar 2 is 9y
total in jar 2 is 10y
but 8x = 10y
x = (5/4)y
also 8x + 10y = 90
8(5/4)y + 10y = 90
10y + 10y = 90
y = 4.5
but both x and y must be whole numbers,
Your question is flawed. 
sorry the total of white marbles is 90
Respond to this Question
Similar Questions

Probabilty
There is a large jar of marbles, containing red, blue, yellow, black and white marbles. How many marbles must you draw(without looking) from the jar to be sure of getting at least three of one color? 
Math
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 … 
Math
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 … 
algebra
One jar holds 16 red marbles and 4 blue marbles. A second jar holds 75 white marbles and 25 blue marbles. What is the probability that a blue marble will be drawn from both jars? 
Math
A jar contains 6 red marbles and 10 blur marbles all of equal size. if Dominic were to randomly select 1 marble without replacement and then select another marble from the jar, what would be the probability of selecting 2 red marbles … 
math
in a jar of 40 marbles there are 12 red marbles 19 blue marbles and there are orange marbles .Find the ratio ratio A pair of numbers that compares different types of units. of each coloured marbles to the total number of marbles. Simplify … 
Ratio
A jar contains 2 red marbles,6 blue marbles,4 white marbles, and 12 black marbles. What is the ratio of white marbles to all marbles? 
PLEASE HELP!
A jar contains 24 blue marbles, 16 red marbles, and 14 white marbles. Find the simplified ratio of total marbles to red marbles. 
math
a jar contains 5 blue marbles, 8 red marbles,4 white marbles,and 3 purple marbles. suppose you pick a marble at random not looking. what is the chance of getting a red marble 
Math "Need Help Asap"!
1.)There are 35 marbles in a bag:9 blue marbles, 8 marbles, 4 red marbles, 4 red marbles, 8 white marbles, & 6 yellow marbles. Find P(Red). Write the probability as a fraction in simplest form, a decimal, & a percent. A.)4/31, 0.129, …