A large metropolitan Police Department's Drugs Enforcement Division repeatedly seizes large hauls of white powder. On analysis, the powder is often found to contain fentanyl cut with lactose. Two out of ten cases also have other drugs in the mix, not just fentanyl.now working in the PD's crime lab and have 15 cases of white powder to process. Calculate the following: 1. What is the probability of finding only two cases of unmixed drugs (only fentanyl mixed in lactose)? 2. What is the probability of finding seven cases of unmixed drugs (only fentanyl mixed in lactose)? 3. The probability of four cases having a mix of drugs