Answer:
i think its 27.
Step-by-step explanation:
Let the number of pink marbles = p
Let the number of yellow marbles = y
The ratio of pink marbles to yellow marbles is 3:5 . This means...
the number of pink marbles / the number of yellow marbles = 3 / 5
p / y = 3 / 5
There are a total of 72 marbles in the bag. So...
the number of pink marbles + the number of yellow marbles = 72
p + y = 72
y = 72 - p
Now we can use this value of y in the first equation and solve for p .
p / (72 - p) = 3 / 5
Multiply both sides of the equation by 5 .
5p / (72 - p) = 3
Multiply both sides by (72 - p)
5p = 3(72 - p)
5p = 216 - 3p
Add 3p to both sides.
8p = 216
Divide both sides by 8 .
p = 27
the number of pink marbles = 27
