A box has 7 white balls,9 red balls and 5 green balls, At least how many balls would you have to take in order to
ensure that you have 3 balls of same colour?

7

Step-by-step explanation:

find the mean

5+9+7=21

21/3=7

If you go to the home page and scroll all the way down, on the right hand side in tiny print there should be a "contact us" box just click that and it will re-direct you to a page where you can talk to a rep.

Hope this helped

Step-by-step explanation:

I would have put the actual email but I don't think there is one that is why I said to go to the contact page.