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Nellie's Tea Shop has caffeinated tea and decaffeinated tea. During the lunchtime rush, the tea shop served 40 teas in all, 70% of which were caffeinated. How many caffeinated teas did the tea shop serve?

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Answer: 28 caffeinated teas

Step-by-step explanation:

The tea shop served 40 teas in all.

70% of this 40 were caffeinated.

The actual number that was caffeinated is therefore:

= Number of teas served * Caffeinated percentage

= 40 * 70%

= 28 caffeinated teas

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