Answer:
18 blueberries
Explanation:
Let no. of blueberries be b.
=> 2 : 9 = b : 81
=> b = 2 x 81 / 9
=> b = 2 x 9
=> 18 blueberries
18, there are 18 blueberries
81÷9=9
2×9=18
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