The way to win the Bingoz game is to collect coupons and then play all of those coupons at the same time. How many do you need? Well, that depends.
Since there are 90 possible numbers, it is possible that it could take you 84 coupons to win (although unlikely that you would need that many).
Here is how that works out. If you look on the board, you can see that I still have 6 numbers left and still have not won. If those were truly the last 6 numbers in the hopper, I would need 84 coupons - plus the one ball that you get that day) to win. You can reduce that number by playing every day, and then using the free ball that comes periodically (of course, someone with coupons seems to win every day or two, so that might just waste your time).
I could show you the statistical model that shows your odds for each each try being the one that wins it for you - but that would blow your mind with how many days you would have a decent statistical probability of winning -- which just suggests what most people know - don't play this without coupons.
We have 7 accounts in our family. So, if you can get one coupon per week per account it takes about 8 - 9 weeks to get enough to be sure you are going to win.
Of course, there is a cost involved (and no one else will tell you this). Let's say you have 7 accounts and decided to collect 63 coupons. Your account gets 7 and the other accounts get the other 56 and send them. Each one they send costs 15 kinzcash to send - for a total of 840 kinzcash. And you do that so that you can win 1000 kinzcash - but only net 160.
So, is it worth it? Maybe for the joy of it, but it is not even the big jackpot you were looking for if you account for the costs.
In a recent forum discussion, a user posted a commonly wrong tip that you just needed 12 - 14 bingoz coupons to win bingoz.
This tip has been repeated on at least 5 other webkinz sites - and shows that people don't check out what they read to make sure it is accurate (ultimately making me distrust all of the other tips).
You can figure out the probability of winning the game using mathematical analysis.
The probability of x marks on the card given y calls is easily calculated as combin(36,x)*combin(54,y-x)/combin(90,y).
Using that formula, I made a spreadsheet and entered the correct numbers for the Webkinz Bingoz game to create this table, shown below, of winning percentages for each Bingoz ball drawn.
The chances of winning Wacky Bingoz by using just 14 coupons (plus the one free ball, for a total of 15 balls) would be only 0.0113% -- about 1 in 8,850.
This results show that around 55 balls, you have a 50% chance of winning, and your odds are best when you get over 90% (around 66 balls).
I personally don't play until I get 84 coupons -- which means that I have a 100% chance of winning (and will probably have around 30 coupons left over when I am done -- a start on the next victory).
Well, there are a few. First, playing Bingoz on a day to day basis is probably a waste, because the vast majority of the winners are people who save coupons.
Second, you have to collect a sizable amount of coupons to ensure victory. It would be a shame to collect 55 coupons, play, and not win (because the odds weren't in your favor).
Third, don't pass along information without trying to verify it. Even when you see multiple sites repeat the same information, it still may not be correct. Passing it along as if it were fact is as bad as the people who send out spammy emails about Microsoft sending money to you (or even a good charity case like a dying kid) as long as you forward to as many people as you can. Essentially, you are lying to the people who are reading the tip (and lying to your friends whose email boxes you are inundating with bad information). So, take the time to check before you pass info along. With Bingoz, it would be easy to check this -- just collect 14 and play - and then see how far you are from winning. It might look like you just need 2 or 3 more balls to win, but the probabilities are really against you.