Australian AMC 2024 - Upper Primary Question 21

Question 21

To prepare a garden bed for growing ginger, Xiao makes a special mix of ginger soil. She first mixes 2 buckets of manure with 4 buckets of compost. Then she mixes 1 bucket of this mixture with 3 buckets of sand to make ginger soil. How much compost is in each bucket of ginger soil?

$\frac16$ of a bucket
$\frac18$ of a bucket
$\frac29$ of a bucket
$\frac1{10}$ of a bucket
$\frac1{12}$ of a bucket