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penfila11Pen
Hey there :)

The ratio that the painter needs to use is:
Green : Yellow
     4    :    7
    28   :    p    (Let p represent how much liters needed of yellow paint is required)

We can cross multiply, which is the ideal method
4 × p = 7 × 28
4p = 196

Divide by 4 on either side to isolate p
[tex] \frac{4p}{4} = \frac{196}{4} [/tex]
p = 49 

[tex]\boxed { Therefore, \ Your \ Answer \ will \ be \ option \ D. \ 49}[/tex]

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