Question

I have 25 red and white marbles in my pocket. If the ratio red to white is 2:3, how many white marbles do I have?

Answer 1

You would have 10 Red 15 White

Answer 2

we have 10 red marbles and 15 white marbles

Explanation:

Step 1: Given data

Total marbles = 25

Ratio red: white = 2:3

Step 2: Write an equation

Red marbles = X

White marbles = Y

X+ Y = 25

X = 2/3 Y

2/3 Y + Y = 25

5/3 Y = 25

Y = 15

X =2/3 * 15 = 10

To control this we can plug this in the equation X + Y = 25

10 + 15 = 25

10/15 = 2/3

This means we have 10 red marbles and 15 white marbles