Mrs Wulu was preparing for her last born's birthday party. She used the ingredients below to bake blueberry muffins for the party. She bought all the ingredients as indicated below to bake the required number of muffins for the guests. Each recipe makes a total of Dozen muffins.

Here are the solutions to the problems:

3.1.1 Step 1: Determine the number of muffins in one dozen. One dozen is equal to 12 muffins.

Step 2: Calculate the total number of muffins for 5 dozens. Total muffins = Number of dozens $\times$ Muffins per dozen $Total muffins = 5 \times 12$ $Total muffins = 60$ The total number of blueberry muffins in 5 dozens is $\boxed{60 muffins}$.

3.1.2 Step 1: Identify the amount of plain flour needed for one dozen muffins from the recipe. The recipe states that $\frac{3}{2}$ cups of plain flour are needed for 1 dozen muffins.

Step 2: Calculate the total cups of plain flour needed for 6 dozens of muffins. Total cups of flour = Cups per dozen $\times$ Number of dozens $Total cups of flour = \frac{3}{2} cups/dozen \times 6 dozens$ $Total cups of flour = \frac{18}{2} cups$ $Total cups of flour = 9 cups$ 9 cups of plain flour will be needed to make 6 dozens of muffins.

3.1.3 Step 1: Use the answer from 3.1.2, which is 9 cups.

Step 2: Use the conversion factor from the table: 1 Cup = 250 ml.

Step 3: Convert cups to milliliters. $Volume in ml = Number of cups \times Conversion factor$ $Volume in ml = 9 cups \times 250 ml/cup$ $Volume in ml = 2250 ml$ The answer in 3.1.2 converted to ml is $\boxed{2250 ml}$.

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