Hi this is a probability question that no one in my math undergrad class could solve. I'm not sure where to start to be honest as its quite different to any probability question I've seen before.
Question: A bag contains a random selection of different sweets.
Some sweets taste "bad" some sweets taste "good". If one sweet in the bag is "bad" the bag is said to be "bad". There are X number of different sweets.
There are Y number of bags. On average a sweet appears in Z number of different bags. On average there are W number of different sweets to a bag.
How many sweets must be bad for us to expect 10% of bags to be bad in terms of X,Y,Z,W?