Question

A shade of green paint is made by mixing blue paint and yellow paint in the ratio of 4 to 3. How many pints of blue paint and yellow

paint are needed to make 21 pints of the green paint?

Answer 1

`Blue = 12`

`Yellow = 9`

Explanation:

Given

`Blue : Yellow = 4 : 3`

Required

Determine the number of pints of each to make 21 of green paints

First, calculate the total ratio.

`Total = 4 + 3`

`Total = 7`

The blue and the yellow pint can be represented individually as:

`Blue = (4)/(7) * Green`

`Yellow = (3)/(7) * Green`

Number of blue paint calculated last week is:

`Blue = (4)/(7) * 21`

`Blue = {4} * 3`

`Blue = 12`

`Yellow = (3)/(7) * Green`

`Yellow = (3)/(7) * 21`

`Yellow = {3} * 3`

`Yellow = 9`