Question

A seed store has 300 kg of lawn seed which is a mixture of 3÷4 rye grass and 1÷4 blue grass

Answer 1

Seed store has seed = 300 kg
Part of green grass = 1/4
Part of rya grass = 3/4
Total kg of green grass = 300x1/4 = 75kg
Total kg of rya grass = 300-75 = 225kg

Answer 2

Answer: 150 kg of blue grass must be added.