A mum ordered 80 cupcakes for her daughter's birthday. Half of them are gluten-free. There are 24 vegan cupcakes and half of them are also gluten-free. How many are non-vegan cupcakes that also contain gluten?
Step-by-step reasoning process below:
28
The gluten - free cupcakes are 80 / 2 = 40.

The vegan cupcakes with gluten are 24 / 2 = 12.

The non - vegan cupcakes with gluten are 40 - 12 = 28.

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The final answer: 28