Answer: 6 eggs
Explanation:
Given : The number of eggs required for the original recipe of muffins = 3
If the number of people coming to the meeting has doubled, then the number of eggs you need to make twice as many muffins will be the product of 2 and 3.
i.e. The number of eggs you need to make twice as many muffins =

Hence, you need 6 eggs to make twice as many muffins.