How many extra stickers did Joseph have Joseph collected stickers He realized he had just enough doubles to give everyone in the class 3 stickers?

That depends. How many people were in his class. A couple answers might be 12, if there 2 people in the class, 24, if there were 4 people.....and so on. Just take a random number times three, then double it, and you have your answer! For example- Random Number=4.

4 times 3= 12, doubled, or times two, is 24. Therefore, if there are four people in Joseph's class, he would have 24 stickers, and 12 extra stickers. Hope that helps...